485BPOS

1933 Act File No.	2-75769
1940 Act File No.	811-3387

Form N-1A

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
	Pre-Effective Amendment No.
	Post-Effective Amendment No.	52
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940
	Amendment No.	46

FEDERATED U.S. GOVERNMENT SECURITIES FUND: 2-5

(Exact Name of Registrant as Specified in Charter)

Federated Investors Funds

4000 Ericsson Drive

Warrendale, PA 15086-7561

(Address of Principal Executive Offices)

(412) 288-1900

(Registrant’s Telephone Number, including Area Code)

John W. McGonigle, Esquire

Federated Investors Tower

Pittsburgh, Pennsylvania 15222-3779

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box):
X	immediately upon filing pursuant to paragraph (b)
	on	pursuant to paragraph (b)
	60 days after filing pursuant to paragraph (a)(1)
	on	pursuant to paragraph (a)(1)
	75 days after filing pursuant to paragraph (a)(2)
	on	pursuant to paragraph (a)(2) of Rule 485
If appropriate, check the following box:
	This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, and the Investment Company Act of 1940, the Registrant, FEDERATED U.S. GOVERNMENT SECURITIES FUND: 2-5 YEARS, certifies that it meets all of the requirements for effectiveness of this Amendment to its Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Pittsburgh and Commonwealth of Pennsylvania, on the 7^th day of April, 2014.

FEDERATED U.S. GOVERNMENT SECURITIES FUND: 2-5 YEARS

BY: /s/ Gail C. Jones

Gail C. Jones, Assistant Secretary

Pursuant to the requirements of the Securities Act of 1933, this Amendment to its Registration Statement has been signed below by the following person in the capacity and on the date indicated:

NAME	TITLE	DATE
BY: /s/ Gail C. Jones Gail C. Jones, Assistant Secretary	Attorney In Fact For the Persons Listed Below	April 7, 2014
John F. Donahue *	Trustee
Lori A. Hensler*	Treasurer (Principal Financial Officer)
John T. Collins*	Trustee
Peter E. Madden*	Trustee
Charles F. Mansfield, Jr.*	Trustee
Thomas O’Neill*	Trustee
P. Jerome Richey*	Trustee
John S. Walsh*	Trustee
*By Power of Attorney

Federated U.S. Government Securities Fund: 2-5 Years

Post-Effective Amendment No. 52

This Post-Effective Amendment is filed for the sole purpose of submitting the XBRL Interactive Data File exhibits for the Risk/Return Summary of the above-named Fund filed as part of Post-Effective Amendment No. 51 on March 28, 2014.  The exhibits filed herewith do not constitute the complete publicly filed disclosure for the Fund, and should be used in conjunction with the complete prospectus for the Fund.

Exhibit List for Interactive Data File Submissions.

EX-101.INS	INSTANCE
EX-101.SCH	SCHEMA
EX-101.CAL	CALCULATION LINKBASE
EX-101.DEF	DEFINITION LINKBASE
EX-101.LAB	LABEL LINKBASE
EX-101.PRE	PRESENTATION LINKBASE

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS
Prospectus Date	rr_ProspectusDate	Mar. 31, 2014
Document Creation Date	dei_DocumentCreationDate	Mar. 28, 2014

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS
Prospectus Date	rr_ProspectusDate	Mar. 31, 2014
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Federated U.S. Government Securities Fund: 2-5 Years (the "Fund")
Objective [Heading]	rr_ObjectiveHeading	RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund's investment objective is current income.
Expense [Heading]	rr_ExpenseHeading	RISK/RETURN SUMMARY: FEES AND EXPENSES
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy and hold Class R Shares (R), Institutional Shares (IS) and Service Shares (SS) of the Fund.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	April 1, 2015
Fee Waiver Or Reimbursement Over Assets, Later Of Termination Or Next Effective Prospectus	fusgsf25y_FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus	up to but not including the later of (the "Termination Date"): (a) April 1, 2015; or (b) the date of the Fund's next effective Prospectus.
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund Shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 312% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	312.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE What are the Fund's Main Investment Strategies?
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund's overall strategy is generally to invest in a portfolio consisting of U.S. Treasury securities and U.S. government agency securities with maturities of not less than two years and not more than five years. The Fund may also use derivative contracts and/or hybrid instruments to implement elements of it strategies. The Fund buys and sells portfolio securities based primarily on its market outlook and analysis of how securities may perform under different market conditions. The Fund evaluates its investment strategy by comparing the performance and composition of the Fund's portfolio to the performance and composition of Bank of America Merrill Lynch 3-5 Year Treasury Index, an index composed of U.S. Treasury notes and bonds with maturities greater than or equal to three years and less than five years. U.S. government securities also may be offered on a delayed delivery basis. The Fund will enter into delayed delivery transactions, including when-issued transactions, in order to participate in these offerings or trade these securities. The Fund may also seek to increase its income by lending its portfolio securities. Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation (Freddie Mac), the Federal National Mortgage Association (Fannie Mae), and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association (Ginnie Mae). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. The Fund may also purchase bonds from the U.S. government backed by the Federal Deposit Insurance Corporation (FDIC). During extreme market conditions such as a zero yield environment, the Fund may invest in government mortgage-backed securities as a temporary investment. The government mortgage-backed securities in which the Fund may invest are government mortgage-backed securities such as those issued by Ginnie Mae, Fannie Mae and Freddie Mac. Because the Fund refers to U.S. government securities in its name, it will notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to invest, under normal circumstances, less than 80% of its assets (plus any borrowings for investment purposes) in U.S. government investments.
Risk [Heading]	rr_RiskHeading	What are the Main Risks of Investing in the Fund?
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund's returns include: Interest Rate Risk. Prices of fixed-income securities generally fall when interest rates rise, which may result in a decrease in the value of Fund Shares. Liquidity Risk. Trading opportunities are more limited for fixed-income securities that have not received any credit ratings, have received ratings below investment grade or are not widely held. These features may make it more difficult to sell or buy a security at a favorable price or time. Consequently, the Fund may have to accept a lower price to sell a security, sell other securities to raise cash or give up an investment opportunity, any of which could have a negative effect on the Fund's performance. Infrequent trading of securities may also lead to an increase in their price volatility. Liquidity risk also refers to the possibility that the Fund may not be able to sell a security or close out a derivative contract when it wants to. If this happens, the Fund will be required to continue to hold the security or keep the position open, and the Fund could incur losses. Over-the-counter (OTC) derivative contracts generally carry greater liquidity risk than exchange-traded contracts. Leverage Risk. Leverage risk is created when an investment, which includes, for example, an investment in a derivative contract, exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund's risk of loss and potential for gain. Investments can have these same results if their returns are based on a multiple of a specified index, security or other benchmark. Risk of Investing in Derivative Contracts and Hybrid Instruments. Derivative contracts and hybrid instruments involve risks different from, or possibly greater than, risks associated with investing directly in securities and other traditional investments. Specific risk issues related to the use of such contracts and instruments include valuation and tax issues, increased potential for losses and/or costs to the Fund and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this Prospectus. Derivative contracts and hybrid instruments may also involve other risks described in this Prospectus or the Fund's Statement of Additional Information (SAI), such as interest rate, credit, liquidity and leverage risks. Risk of Investing in Inflation-Protected Securities. The value of inflation-protected securities is subject to the effects of changes in market interest rates caused by factors other than inflation ("real interest rates"). If interest rates rise due to reasons other than inflation, the Fund's investment in these securities may not be protected to the extent that the increase is not reflected in the security's inflation measure. Generally, when real interest rates rise, the value of inflation-protected securities will fall and the Fund's value may decline as a result of this exposure to these securities. The greatest risk occurs when interest rates rise and inflation declines. Prepayment Risk. When homeowners prepay their mortgages in response to lower interest rates, the Fund will be required to reinvest the proceeds at the lower interest rates available. Also, when interest rates fall, the price of mortgage-backed securities may not rise to as great an extent as that of other fixed-income securities. Credit Risk. It is possible that interest or principal on securities will not be paid when due. Such non-payment or default may reduce the value of the Fund's portfolio holdings, its share price and its performance. Mortgage-Backed Securities Risk. Mortgage-backed securities (MBS) have unique risks. A rise in interest rates may cause the value of MBS held by the Fund to decline. MBS are subject to the risk that payments made on a security will not be made when due. Certain MBS issued by U.S. government-sponsored enterprises are not backed by the full faith and credit of the U.S. government. Technology Risk. The Adviser uses various technologies in managing the Fund, consistent with its investment objective and strategy described in this Prospectus. For example, proprietary and third-party data and systems are utilized to support decision making for the Fund.  Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance. The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance: Bar Chart and Table Risk/Return Bar Chart
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns for each class averaged over the stated periods, and includes comparative performance information. The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.
Performance Additional Market Index [Text]	rr_PerformanceAdditionalMarketIndex	BofA Merrill Lynch 3-5 Year Treasury Index is an unmanaged index tracking U.S. treasury securities with maturities of 3 to 4.99 years. Morningstar figures represent the average of the total returns reported by all the mutual funds designated by Morningstar as falling into the respective category indicated. They do not reflect sales charges.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-800-341-7400
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	FederatedInvestors.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Federated U.S. Government Securities Fund: 2-5 Years -  IS Class
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 6.20% (quarter ended December 31, 2008). Its lowest quarterly return was (2.44)% (quarter ended June 30, 2004).
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Return Table
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using a standard set of assumptions. The stated returns assume the highest historical federal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown only for IS class, and after-tax returns for R and SS classes will differ from those shown for IS class.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	In addition to Return Before Taxes, Return After Taxes is shown for the Fund's IS class to illustrate the effect of federal taxes on Fund returns. After-tax returns are shown only for IS class, and after-tax returns for R and SS classes will differ from those shown for IS class. Actual after-tax returns depend on each investor's personal tax situation, and are likely to differ from those shown. After-tax returns are calculated using a standard set of assumptions. The stated returns assume the highest historical federal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes. After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan. (For the Period Ended December 31, 2013)
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS | R
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee (as a percentage of amount redeemed, if applicable)	rr_RedemptionFeeOverRedemption	none
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fee	rr_ManagementFeesOverAssets	0.40%
Distribution (12b-1) Fee	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other Expenses	rr_OtherExpensesOverAssets	0.29%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.19%
Fee Waivers and/or Expense Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	none	[1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	rr_NetExpensesOverAssets	1.19%
1 Year	rr_ExpenseExampleYear01	$ 121
3 Years	rr_ExpenseExampleYear03	378
5 Years	rr_ExpenseExampleYear05	654
10 Years	rr_ExpenseExampleYear10	1,443
1 Year	rr_AverageAnnualReturnYear01	(2.35%)
5 Years	rr_AverageAnnualReturnYear05	1.01%
10 Years	rr_AverageAnnualReturnYear10	2.64%
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS | IS
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee (as a percentage of amount redeemed, if applicable)	rr_RedemptionFeeOverRedemption	none
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fee	rr_ManagementFeesOverAssets	0.40%
Distribution (12b-1) Fee	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.45%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.85%
Fee Waivers and/or Expense Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	0.27%	[1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	rr_NetExpensesOverAssets	0.58%
1 Year	rr_ExpenseExampleYear01	87
3 Years	rr_ExpenseExampleYear03	271
5 Years	rr_ExpenseExampleYear05	471
10 Years	rr_ExpenseExampleYear10	1,049
2004	rr_AnnualReturn2004	1.60%
2005	rr_AnnualReturn2005	0.87%
2006	rr_AnnualReturn2006	3.34%
2007	rr_AnnualReturn2007	9.18%
2008	rr_AnnualReturn2008	10.64%
2009	rr_AnnualReturn2009	0.28%
2010	rr_AnnualReturn2010	4.26%
2011	rr_AnnualReturn2011	4.67%
2012	rr_AnnualReturn2012	1.16%
2013	rr_AnnualReturn2013	(1.84%)
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	highest quarterly return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Dec. 31, 2008
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	6.20%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	lowest quarterly return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2004
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(2.44%)
1 Year	rr_AverageAnnualReturnYear01	(1.84%)
5 Years	rr_AverageAnnualReturnYear05	1.67%
10 Years	rr_AverageAnnualReturnYear10	3.35%
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS | SS
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	rr_MaximumDeferredSalesChargeOverOther	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee (as a percentage of amount redeemed, if applicable)	rr_RedemptionFeeOverRedemption	none
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fee	rr_ManagementFeesOverAssets	0.40%
Distribution (12b-1) Fee	rr_DistributionAndService12b1FeesOverAssets	none	[2]
Other Expenses	rr_OtherExpensesOverAssets	0.48%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.88%
Fee Waivers and/or Expense Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	0.07%	[1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	rr_NetExpensesOverAssets	0.81%
1 Year	rr_ExpenseExampleYear01	90
3 Years	rr_ExpenseExampleYear03	281
5 Years	rr_ExpenseExampleYear05	488
10 Years	rr_ExpenseExampleYear10	$ 1,084
1 Year	rr_AverageAnnualReturnYear01	(2.07%)
5 Years	rr_AverageAnnualReturnYear05	1.44%
10 Years	rr_AverageAnnualReturnYear10	3.11%
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS | Return After Taxes on Distributions | IS
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(2.50%)
5 Years	rr_AverageAnnualReturnYear05	0.56%
10 Years	rr_AverageAnnualReturnYear10	2.07%
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS | Return After Taxes on Distributions and Sale of Fund Shares | IS
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(0.91%)
5 Years	rr_AverageAnnualReturnYear05	0.98%
10 Years	rr_AverageAnnualReturnYear10	2.16%
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS | BofA Merrill Lynch 3-5 Year Treasury Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(0.91%)	[3]
5 Years	rr_AverageAnnualReturnYear05	2.34%	[3]
10 Years	rr_AverageAnnualReturnYear10	3.96%	[3]
FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS | Morningstar Short Government Funds Average
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(0.79%)	[4]
5 Years	rr_AverageAnnualReturnYear05	1.70%	[4]
10 Years	rr_AverageAnnualReturnYear10	2.55%	[4]

[1] The Adviser and its affiliates have voluntarily agreed to waive their fees and/or reimburse expenses so that the total annual fund operating expenses (excluding acquired fund fees and expenses, extraordinary expenses, and proxy-related expenses paid by the Fund, if any) paid by the Fund's R, IS and SS classes (after the voluntary waivers and/or reimbursements) will not exceed 1.22%, 0.58% and 0.81% (the "Fee Limit"), respectively, up to but not including the later of (the "Termination Date"): (a) April 1, 2015; or (b) the date of the Fund's next effective Prospectus. While the Adviser and its affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Trustees.

[2] The Fund has adopted a Distribution (12b-1) Plan for its Service Shares class shares pursuant to which the SS class of the Fund may incur or charge a Distribution (12-1) Fee of up to a maximum of 0.05%. No such fee is currently incurred or charged by the SS class of the Fund. The SS class of the Fund will not incur or charge such a Distribution (12b-1) Fee until such time as approved by the Fund's Board of Trustees (the "Trustees").

[3] BofA Merrill Lynch 3-5 Year Treasury Index is an unmanaged index tracking U.S. treasury securities with maturities of 3 to 4.99 years.

[4] Morningstar figures represent the average of the total returns reported by all the mutual funds designated by Morningstar as falling into the respective category indicated. They do not reflect sales charges.

XML

FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS

Federated U.S. Government Securities Fund: 2-5 Years (the "Fund")

RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE

The Fund's investment objective is current income.

RISK/RETURN SUMMARY: FEES AND EXPENSES

This table describes the fees and expenses that you may pay if you buy and hold Class R Shares (R), Institutional Shares (IS) and Service Shares (SS) of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS	R	IS	SS
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable)	none	none	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price)	none	none	none
Redemption Fee (as a percentage of amount redeemed, if applicable)	none	none	none
Exchange Fee	none	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS		R	IS	SS
Management Fee		0.40%	0.40%	0.40%
Distribution (12b-1) Fee		0.50%	none	none	[1]
Other Expenses		0.29%	0.45%	0.48%
Total Annual Fund Operating Expenses		1.19%	0.85%	0.88%
Fee Waivers and/or Expense Reimbursements	[2]	none	0.27%	0.07%
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements		1.19%	0.58%	0.81%

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:

Expense Example FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS (USD $)	1 Year	3 Years	5 Years	10 Years
R	121	378	654	1,443
IS	87	271	471	1,049
SS	90	281	488	1,084

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund Shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 312% of the average value of its portfolio.

RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE

What are the Fund's Main Investment Strategies?

The Fund's overall strategy is generally to invest in a portfolio consisting of U.S. Treasury securities and U.S. government agency securities with maturities of not less than two years and not more than five years. The Fund may also use derivative contracts and/or hybrid instruments to implement elements of it strategies. The Fund buys and sells portfolio securities based primarily on its market outlook and analysis of how securities may perform under different market conditions. The Fund evaluates its investment strategy by comparing the performance and composition of the Fund's portfolio to the performance and composition of Bank of America Merrill Lynch 3-5 Year Treasury Index, an index composed of U.S. Treasury notes and bonds with maturities greater than or equal to three years and less than five years.

U.S. government securities also may be offered on a delayed delivery basis. The Fund will enter into delayed delivery transactions, including when-issued transactions, in order to participate in these offerings or trade these securities. The Fund may also seek to increase its income by lending its portfolio securities.

Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation (Freddie Mac), the Federal National Mortgage Association (Fannie Mae), and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association (Ginnie Mae). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.

The Fund may also purchase bonds from the U.S. government backed by the Federal Deposit Insurance Corporation (FDIC).

During extreme market conditions such as a zero yield environment, the Fund may invest in government mortgage-backed securities as a temporary investment. The government mortgage-backed securities in which the Fund may invest are government mortgage-backed securities such as those issued by Ginnie Mae, Fannie Mae and Freddie Mac.

Because the Fund refers to U.S. government securities in its name, it will notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to invest, under normal circumstances, less than 80% of its assets (plus any borrowings for investment purposes) in U.S. government investments.

What are the Main Risks of Investing in the Fund?

All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund's returns include:

• Interest Rate Risk. Prices of fixed-income securities generally fall when interest rates rise, which may result in a decrease in the value of Fund Shares.

• Liquidity Risk. Trading opportunities are more limited for fixed-income securities that have not received any credit ratings, have received ratings below investment grade or are not widely held. These features may make it more difficult to sell or buy a security at a favorable price or time. Consequently, the Fund may have to accept a lower price to sell a security, sell other securities to raise cash or give up an investment opportunity, any of which could have a negative effect on the Fund's performance. Infrequent trading of securities may also lead to an increase in their price volatility. Liquidity risk also refers to the possibility that the Fund may not be able to sell a security or close out a derivative contract when it wants to. If this happens, the Fund will be required to continue to hold the security or keep the position open, and the Fund could incur losses. Over-the-counter (OTC) derivative contracts generally carry greater liquidity risk than exchange-traded contracts.

• Leverage Risk. Leverage risk is created when an investment, which includes, for example, an investment in a derivative contract, exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund's risk of loss and potential for gain. Investments can have these same results if their returns are based on a multiple of a specified index, security or other benchmark.

• Risk of Investing in Derivative Contracts and Hybrid Instruments. Derivative contracts and hybrid instruments involve risks different from, or possibly greater than, risks associated with investing directly in securities and other traditional investments. Specific risk issues related to the use of such contracts and instruments include valuation and tax issues, increased potential for losses and/or costs to the Fund and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this Prospectus. Derivative contracts and hybrid instruments may also involve other risks described in this Prospectus or the Fund's Statement of Additional Information (SAI), such as interest rate, credit, liquidity and leverage risks.

• Risk of Investing in Inflation-Protected Securities. The value of inflation-protected securities is subject to the effects of changes in market interest rates caused by factors other than inflation ("real interest rates"). If interest rates rise due to reasons other than inflation, the Fund's investment in these securities may not be protected to the extent that the increase is not reflected in the security's inflation measure. Generally, when real interest rates rise, the value of inflation-protected securities will fall and the Fund's value may decline as a result of this exposure to these securities. The greatest risk occurs when interest rates rise and inflation declines.

• Prepayment Risk. When homeowners prepay their mortgages in response to lower interest rates, the Fund will be required to reinvest the proceeds at the lower interest rates available. Also, when interest rates fall, the price of mortgage-backed securities may not rise to as great an extent as that of other fixed-income securities.

• Credit Risk. It is possible that interest or principal on securities will not be paid when due. Such non-payment or default may reduce the value of the Fund's portfolio holdings, its share price and its performance.

• Mortgage-Backed Securities Risk. Mortgage-backed securities (MBS) have unique risks. A rise in interest rates may cause the value of MBS held by the Fund to decline. MBS are subject to the risk that payments made on a security will not be made when due. Certain MBS issued by U.S. government-sponsored enterprises are not backed by the full faith and credit of the U.S. government.

• Technology Risk. The Adviser uses various technologies in managing the Fund, consistent with its investment objective and strategy described in this Prospectus. For example, proprietary and third-party data and systems are utilized to support decision making for the Fund.  Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance.

The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Performance: Bar Chart and Table

Risk/Return Bar Chart

The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns for each class averaged over the stated periods, and includes comparative performance information. The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.

Federated U.S. Government Securities Fund: 2-5 Years -  IS Class

Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 6.20% (quarter ended December 31, 2008). Its lowest quarterly return was (2.44)% (quarter ended June 30, 2004).

Average Annual Total Return Table

In addition to Return Before Taxes, Return After Taxes is shown for the Fund's IS class to illustrate the effect of federal taxes on Fund returns. After-tax returns are shown only for IS class, and after-tax returns for R and SS classes will differ from those shown for IS class. Actual after-tax returns depend on each investor's personal tax situation, and are likely to differ from those shown. After-tax returns are calculated using a standard set of assumptions. The stated returns assume the highest historical federal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes. After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan.

(For the Period Ended December 31, 2013)

Average Annual Total Returns FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS		1 Year	5 Years	10 Years
R		(2.35%)	1.01%	2.64%
IS		(1.84%)	1.67%	3.35%
IS Return After Taxes on Distributions		(2.50%)	0.56%	2.07%
IS Return After Taxes on Distributions and Sale of Fund Shares		(0.91%)	0.98%	2.16%
SS		(2.07%)	1.44%	3.11%
BofA Merrill Lynch 3-5 Year Treasury Index (reflects no deduction for fees, expenses or taxes)	[1]	(0.91%)	2.34%	3.96%
Morningstar Short Government Funds Average	[2]	(0.79%)	1.70%	2.55%

[1] The Fund has adopted a Distribution (12b-1) Plan for its Service Shares class shares pursuant to which the SS class of the Fund may incur or charge a Distribution (12-1) Fee of up to a maximum of 0.05%. No such fee is currently incurred or charged by the SS class of the Fund. The SS class of the Fund will not incur or charge such a Distribution (12b-1) Fee until such time as approved by the Fund's Board of Trustees (the "Trustees").

[2] The Adviser and its affiliates have voluntarily agreed to waive their fees and/or reimburse expenses so that the total annual fund operating expenses (excluding acquired fund fees and expenses, extraordinary expenses, and proxy-related expenses paid by the Fund, if any) paid by the Fund's R, IS and SS classes (after the voluntary waivers and/or reimbursements) will not exceed 1.22%, 0.58% and 0.81% (the "Fee Limit"), respectively, up to but not including the later of (the "Termination Date"): (a) April 1, 2015; or (b) the date of the Fund's next effective Prospectus. While the Adviser and its affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Trustees.

[1] BofA Merrill Lynch 3-5 Year Treasury Index is an unmanaged index tracking U.S. treasury securities with maturities of 3 to 4.99 years.

[2] Morningstar figures represent the average of the total returns reported by all the mutual funds designated by Morningstar as falling into the respective category indicated. They do not reflect sales charges.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Jan. 31, 2014
Registrant Name	dei_EntityRegistrantName	FEDERATED U S GOVERNMENT SECURITIES FUND 2-5 YEARS
Central Index Key	dei_EntityCentralIndexKey	0000357159
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Mar. 28, 2014
Document Effective Date	dei_DocumentEffectiveDate	Mar. 31, 2014
Prospectus Date	rr_ProspectusDate	Mar. 31, 2014