Nationwide International Index Fund
Summary Prospectus March 1, 2010 (as revised May 6, 2010)

Class/Ticker A GIIAX B GIIBX C GIICX R2 GIIRX Institutional Class GIXIX

Before you invest, you may want to review the Fund’s Prospectus, which contains information about the Fund and its risks. The Fund’s Prospectus and Statement of Additional Information, both dated March 1, 2010, as revised May 6, 2010, are incorporated by reference into this Summary Prospectus. For free paper or electronic copies of the Fund’s Prospectus and other information about the Fund, go to http://www.nationwide.com/mutualfundprospectuses, email a request to web_help@nationwide.com or call 800-848-0920, or ask any financial advisor, bank, or broker-dealer who offers shares of the Fund.

Objective

The Fund seeks to match the performance of the MSCI Europe, Australasia and Far East Index (“MSCI EAFE^® Index”) as closely as possible before the deduction of Fund expenses.

Fees and Expenses

This table describes the fees and expenses you may pay when buying and holding shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Nationwide Funds. More information about these and other discounts is available from your financial professional and in “Investing with Nationwide Funds” commencing on page 33 of the Prospectus and in “Additional Information on Purchases and Sales” commencing on page 76 of the Statement of Additional Information.

	Class A	Class B	Class C	Class R2	Institutional Class
	Shares	Shares	Shares	Shares	Shares
Shareholder Fees (paid directly from your investment)
Maximum Sales Charge (Load) imposed upon purchases (as a percentage of offering price)	5.75%	None	None	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of offering or sale price, whichever is less)	None	5.00%	1.00%	None	None
Redemption/Exchange Fee (as a percentage of amount redeemed or exchanged within 7 days of purchase)	2.00%	2.00%	2.00%	2.00%	2.00%
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fees	0.27%	0.27%	0.27%	0.27%	0.27%
Distribution and/or Service (12b-1) Fees	0.25%	1.00%	1.00%	0.50%	None
Other Expenses1	0.25%	0.10%	0.10%	0.30%	0.10%
Total Annual Fund Operating Expenses	0.77%	1.37%	1.37%	1.07%	0.37%

1 The Board of Trustees of Nationwide Mutual Funds (the “Trust”) has approved a new methodology for the allocation of certain Fund expenses, effective May 1, 2010, including those relating to the provision of administration and transfer agency services, as reflected in a new Joint Fund Administration and Transfer Agency Agreement. Accordingly, “Other Expenses” have been restated to reflect the new expense allocation methodology.

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Example

This Example is intended to help you to 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 in the Fund for the time periods indicated and then sell all of your shares at the end of those periods. It assumes a 5% return each year and no change in expenses. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	1 Year		3 Years		5 Years		10 Years
Class A shares	$	649	$	807	$	978	$	1,474
Class B shares		639		734		950		1,405
Class C shares		239		434		750		1,646
Class R2 shares		109		340		590		1,306
Institutional Class shares		38		119		208		468

You would pay the following expenses on the same investment if you did not sell your shares:

	1 Year		3 Years		5 Years		10 Years
Class B shares	$	139	$	434	$	750	$	1,405
Class C shares		139		434		750		1,646

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 11.22% of the average value of its portfolio.

Principal Investment Strategies

The Fund employs a “passive” management, or indexing, approach, designed to match approximately the performance of the MSCI EAFE Index before the deduction of Fund expenses. The MSCI EAFE Index includes securities of large-cap companies located in Europe, Australia and Asia (including the Far East). Under normal circumstances, the Fund invests at least 80% of its net assets in a statistically selected sampling of equity securities of companies included in the MSCI EAFE Index and in derivative instruments linked to the MSCI EAFE Index, primarily futures contracts.

Principal Risks

The Fund cannot guarantee that it will achieve its investment objective.

As with any fund, the value of the Fund’s investments—and therefore, the value of Fund shares—may fluctuate. These changes may occur because of:

Stock market risk – the Fund could lose value if the individual stocks in which it invests or overall stock markets in which such stocks trade go down.

Foreign securities risk – foreign securities may be more volatile, harder to price and less liquid than U.S. securities. The prices of foreign securities may be further affected by other factors, such as changes in the exchange rates between the dollar and the currencies in which the securities are traded.

Index fund risk – the Fund does not use defensive strategies or attempt to reduce its exposure to poor performing securities. Further, correlation between the Fund’s performance and that of the index may be negatively affected by the Fund’s expenses, changes in the composition of the index, and the timing of purchase and redemption of Fund shares.

Derivatives risk – derivatives can disproportionately increase losses and reduce opportunities for gains when the security prices, interest rates, currency values, or other such measures underlying derivatives change in unexpected ways. They also present default risks if the counterparty to a derivatives contract fails to fulfill its obligations to the Fund.

If the value of the Fund’s investments goes down, you may lose money.

Performance

The bar chart and table that follow can help you evaluate the Fund’s potential risks. The bar chart shows how the Fund’s annual total returns have varied from year to year. These returns do not reflect the impact of sales charges. If the applicable sales charges were included, the annual total returns would be lower than those shown. The table compares the Fund’s average annual total returns to the returns of a broad-based securities index. Remember, however, that past performance (before and after taxes) is not necessarily indicative of how the Fund will perform in the future. Updated performance information is available at no cost by visiting www.nationwide.com/mutualfunds or by calling 800-848-0920.

Annual Total Returns – Class A Shares

(Years Ended December 31,)

Best Quarter:  25.16% – 2nd qtr. of 2009          

Worst Quarter:  −21.10% – 3rd qtr. of 2002          

After-tax returns are shown in the table for Class A shares only and will vary for other classes. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Your actual after-tax return depends on your personal tax situation and may differ from what is shown here. After-tax returns are not relevant to investors in tax-deferred arrangements, such as

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individual retirement accounts, 401(k) plans or certain other employer-sponsored retirement plans.

The inception dates for the Class C and Class R2 shares are February 14, 2005 and March 9, 2007, respectively. Pre-inception historical performance for Class C shares is based on the previous performance of Class B shares. Pre-inception historical performance for Class R2 shares is based on the previous performance of Class A shares. Performance for these classes has been adjusted to reflect differences in sales charges between classes, but not differing expenses.

Average Annual Total Returns

For the Periods Ended December 31, 2009:

	1 Year			5 Years			10 Years
Class A shares – Before Taxes		21.39	%		1.87	%		−0.14	%
Class A shares – After Taxes on Distributions		20.70	%		0.77	%		−0.89	%
Class A shares – After Taxes on Distributions and Sales of Shares		14.30	%		1.42	%		−0.33	%
Class B shares – Before Taxes		22.69	%		2.11	%		−0.23	%
Class C shares – Before Taxes		26.71	%		2.19	%		−0.34	%
Class R2 shares – Before Taxes		28.36	%		3.03	%		0.42	%
Institutional Class shares – Before Taxes		29.14	%		3.48	%		0.84	%
MSCI EAFE® Index (The Index does not pay sales charges, fees or expenses.)		31.78	%		3.54	%		1.17	%

Portfolio Management

Investment Adviser

Nationwide Fund Advisors

Subadviser

BlackRock Investment Management, LLC (“BlackRock”)

Portfolio Manager

Portfolio Manager	Title	Length of Service
Debra L. Jelilian	Managing Director, BlackRock	Since August 1999
Edward Corallo	Managing Director and Portfolio Manager, BlackRock	Since April 2010

Purchase and Sale of Fund Shares

Minimum Initial Investment
Classes A, B*, C: $2,000
Class R2: no minimum
Institutional Class: $1,000,000
Automatic Asset Accumulation Plan (Classes A, B*, C): $1,000

Minimum Additional Investment
Classes A, B*, C: $100
Class R2, Institutional Class: no minimum
Automatic Asset Accumulation Plan (Classes A, B*, C): $50
* Class B Shares are closed to new investors.

To Place Orders
Mail:	Overnight:	Website:
Nationwide Funds P.O. Box 5354 Cincinnati, OH 45201-5354 Fax: 800-421-2182	Nationwide Funds 303 Broadway, Suite 900 Cincinnati, OH 45202	www.nationwide.com/ mutualfunds
Phone: 800-848-0920 (toll free). Representatives are available 8 a.m. – 7 p.m. Eastern time, Monday through Friday.

In general, you can buy or sell (redeem) shares of the Funds by mail or phone on any business day. You can generally pay for shares by check or wire.

Tax Information

The Fund’s distributions are taxable, and will generally be taxed as ordinary income, capital gains, or some combination of both, unless you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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