FEBRUARY 28, 2018

SUMMARY PROSPECTUS

BlackRock Liquidity Funds  |  Administration Shares

^Ø   California Money Fund

Administration: BLCXX

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus (including amendments and supplements) and other information about the Fund, including the Fund’s statement of additional information and shareholder report, online at http://www.blackrock.com/prospectus/cash. You can also get this information at no cost by calling (800) 441-7450 or by sending an e-mail request to prospectus.request@blackrock.com, or from your financial professional. The Fund’s prospectus and statement of additional information, both dated February 28, 2018, as amended and supplemented from time to time, are incorporated by reference into (legally made a part of) this Summary Prospectus.

This Summary Prospectus contains information you should know before investing, including information about risks. Please read it before you invest and keep it for future reference.

The Securities and Exchange Commission has not approved or disapproved these securities or passed upon the adequacy of this Summary Prospectus. Any representation to the contrary is a criminal offense.

Not FDIC Insured • May Lose Value • No Bank Guarantee

Summary Prospectus

Key Facts About California Money Fund

Investment Objective

The investment objective of California Money Fund (the “Fund”), a series of BlackRock Liquidity Funds (the “Trust”), is to seek as high a level of current income that is exempt from federal income tax and, to the extent possible, from California State personal income tax, as is consistent with liquidity and stability of principal.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold Administration Shares of California Money Fund.

Annual Fund Operating Expenses

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

	Administration Shares*
Management Fee	0.38%
Distribution (12b-1) Fees	None
Other Expenses	0.46%
Shareholder Servicing Fees	0.10%
Miscellaneous/Other Expenses	0.36%
Total Annual Fund Operating Expenses	0.84%
Fee Waivers and/or Expense Reimbursements1	(0.54)%
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements1	0.30%

* Fund currently active, but no assets in share class as of the fiscal year ended October 31, 2017.

¹  As described in the “Management of the Funds” section of the Fund’s prospectus beginning on page 70, BlackRock Advisors, LLC (“BlackRock”), the Fund’s investment manager, has contractually agreed to waive fees and/or reimburse ordinary operating expenses in order to keep combined Management Fees and Miscellaneous/Other Expenses (excluding Dividend Expense, Interest Expense, Acquired Fund Fees and Expenses and certain other Fund expenses) from exceeding 0.20% of average daily net assets through February 28, 2019. The agreement may be terminated upon 90 days’ notice by a majority of the non-interested trustees of the Trust or by a vote of a majority of the outstanding voting securities of the Fund.

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 in the Fund 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 the Fund’s operating expenses remain the same. 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
Administration Shares	$31	$214	$413	$987

Principal Investment Strategies of the Fund

California Money Fund invests primarily in a broad range of short-term obligations and derivative securities such as beneficial interests in municipal trust certificates and partnership trusts (“Municipal Obligations”) issued by or on behalf of the State of California and its authorities, agencies, instrumentalities and political subdivisions. The Fund may also invest in Municipal Obligations issued by or on behalf of other states, territories and possessions of the United States, the District of Columbia and

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their respective authorities, agencies, instrumentalities and political subdivisions. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus the amount of any borrowing for investment purposes, in Municipal Obligations, the interest on which, in the opinion of counsel to the issuer of the obligation, is exempt from taxation under the Constitution or statutes of California, including municipal securities issued by the State of California and its political subdivisions, as well as certain other governmental issuers, such as the Commonwealth of Puerto Rico, the U.S. Virgin Islands and Guam, that pay interest that, in the opinion of counsel to the issuer, is exempt from federal income tax and from California personal income tax (“California Municipal Obligations”). Additionally, the Fund may not invest less than 80% of its assets in securities the interest on which is exempt from federal income taxes, except during defensive periods or during periods of unusual market conditions. Dividends paid by the Fund that are derived from interest on California Municipal Obligations are exempt from regular federal and California State personal income tax. Municipal Obligations in which the Fund may invest, however, may be subject to the federal alternative minimum tax, although the Fund does not currently intend to invest in Municipal Obligations that are subject to the federal alternative minimum tax. The Fund invests in securities maturing in 397 days or less (with certain exceptions) and the portfolio will have a dollar-weighted average maturity of 60 days or less and a dollar-weighted average life of 120 days or less. The Fund may also invest in variable and floating rate instruments, and transact in securities on a when-issued, delayed delivery or forward commitment basis.

The securities purchased by the Fund are subject to the quality, diversification, and other requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended (the “1940 Act”), and other rules of the Securities and Exchange Commission. The Fund will only purchase securities that present minimal credit risk as determined by BlackRock, the Fund’s investment manager, pursuant to guidelines approved by the Trust’s Board of Trustees (the “Board”).

Principal Risks of Investing in the Fund

Risk is inherent in all investing. You could lose money by investing in the Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The Fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the Fund’s liquidity falls below required minimums because of market conditions or other factors. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund’s sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time.

The following is a summary description of principal risks of investing in the Fund.

◾ Credit Risk — Credit risk refers to the possibility that the issuer of a debt security (i.e., the borrower) will not be able to make payments of interest and principal when due. Changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of the Fund’s investment in that issuer.

◾ Foreign Exposure Risk — Securities issued or supported by foreign entities, including foreign banks and corporations, may involve additional risks and considerations. Extensive public information about the foreign issuer may not be available, and unfavorable political, economic or governmental developments in the foreign country involved could affect the payment of principal and interest.

◾ Income Risk — Income risk is the risk that the Fund’s yield will vary as short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates.

◾ Interest Rate Risk — Interest rate risk is the risk that the value of a debt security may fall when interest rates rise. In general, the market price of debt securities with longer maturities will go up or down more in response to changes in interest rates than the market price of shorter term securities. Due to fluctuations in interest rates, the market value of such securities may vary during the period shareholders own shares of the Fund.

◾ Liquidity Fee and Redemption Gate Risk — The Board has discretion to impose a liquidity fee of up to 2% upon sale of your shares or may temporarily suspend your ability to sell shares if the Fund’s liquidity falls below required minimums because of market conditions or other factors. Accordingly, you may not be able to sell your shares or your redemptions may be subject to a liquidity fee when you sell your shares at certain times.

◾ Market Risk and Selection Risk — Market risk is the risk that one or more markets in which the Fund invests will go down in value, including the possibility that the markets will go down sharply and unpredictably. Selection risk is the risk that the securities selected by Fund management will underperform the markets, the relevant indices or the securities selected by other funds with similar investment objectives and investment strategies. This means you may lose money.

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◾ Municipal Securities Concentration Risk — From time to time the Fund may invest a substantial amount of its assets in municipal securities whose interest is paid solely from revenues of similar projects, if such investment is deemed necessary or appropriate by BlackRock. If the Fund concentrates its investments in this manner, it assumes the legal and economic risks relating to such projects and this may have a significant impact on the Fund’s investment performance.

◾ Municipal Securities Risks — Municipal securities risks include the ability of the issuer to repay the obligation, the relative lack of information about certain issuers of municipal securities, and the possibility of future legislative changes which could affect the market for and value of municipal securities. Certain municipal securities, including private activity bonds, are not backed by the full faith, credit and taxing power of the issuer. Additionally, if events occur after the security is acquired that impact the security’s tax-exempt status, the Fund and its shareholders could be subject to substantial tax liabilities.

◾ Non-Diversification Risk — The Fund concentrates its investments in securities of issuers located in California. This raises special concerns because the Fund may be more exposed to the risks associated with, and developments affecting, an individual issuer than a fund that invests more widely. In particular, changes in the economic conditions and governmental policies of California and its political subdivisions, including as a result of legislation or litigation changing the taxation of municipal securities or the rights of municipal security holders in the event of bankruptcy, could impact the value of the Fund’s shares.

◾ Stable Net Asset Value Risk — The Fund may not be able to maintain a stable net asset value (“NAV”) of $1.00 per share at all times. If the Fund fails to maintain a stable NAV (or if there is a perceived threat of such a failure), the Fund, along with other money market funds, could be subject to increased redemption activity.

◾ State Specific Risk — A substantial part of the portfolio of the Fund will, under normal circumstances, be composed of California Municipal Obligations. As a result, the Fund will be more susceptible to any economic, business and political risks or other developments which generally affect California and the issuers of California Municipal Obligations. For more information on the risks associated with California Municipal Obligations, see “Non-Diversification Risk” above and “Details about the Funds—Investment Risks—Principal Risks of Investing in the Funds—State Specific Risk—California Money Fund” below as well as Appendix B to the Statement of Additional Information.

◾ Taxability Risk — Future laws, regulations, rulings or court decisions may cause interest on municipal securities to be subject, directly or indirectly, to federal income taxation, or interest on state municipal securities to be subject to state or local income taxation, or the value of state municipal securities to be subject to state or local intangible personal property tax, or may otherwise prevent the Fund from realizing the full current benefit of the tax-exempt status of such securities. Any such change could also affect the market price of such securities, and thus the value of an investment in the Fund.

◾ Treasury Obligations Risk — Direct obligations of the U.S. Treasury have historically involved little risk of loss of principal if held to maturity. However, due to fluctuations in interest rates, the market value of such securities may vary during the period shareholders own shares of the Fund.

◾ U.S. Government Obligations Risk — Certain securities in which the Fund may invest, including securities issued by certain U.S. Government agencies and U.S. Government sponsored enterprises, are not guaranteed by the U.S. Government or supported by the full faith and credit of the United States.

◾ Variable and Floating Rate Instrument Risk — The absence of an active market for these securities could make it difficult for the Fund to dispose of them if the issuer defaults.

◾ When-Issued and Delayed Delivery Securities and Forward Commitments Risk — When-issued and delayed delivery securities and forward commitments involve the risk that the security the Fund buys will lose value prior to its delivery. There also is the risk that the security will not be issued or that the other party to the transaction will not meet its obligation. If this occurs, the Fund may lose both the investment opportunity for the assets it set aside to pay for the security and any gain in the security’s price.

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Performance Information

There are currently no Administration Shares of California Money Fund outstanding as of the date of this prospectus. As a result, the chart, the table and the seven-day yield shown below give you a picture of the performance for Institutional Shares of the Fund, which are not offered in this prospectus. The performance of the Fund’s Administration Shares would be substantially similar to Institutional Shares because Administration Shares and Institutional Shares are invested in the same portfolio of securities and performance would only differ to the extent that Administration Shares and Institutional Shares have different expenses. The actual returns and seven-day yields of Administration Shares would have been lower than those of the Institutional Shares because Administration Shares have higher expenses than the Institutional Shares.

The information shows you how California Money Fund’s performance has varied year by year and provides some indication of the risks of investing in the Fund. As with all such investments, past performance is not an indication of future results. The table includes all applicable fees. If BlackRock and its affiliates had not waived or reimbursed certain Fund expenses during these periods, the Fund’s returns would have been lower. The Fund is a money market fund managed pursuant to the requirements of Rule 2a-7 under the 1940 Act. Effective May 28, 2010, Rule 2a-7 was amended to impose new liquidity, credit quality and maturity requirements on all money market funds. Fund performance shown prior to May 28, 2010 is based on 1940 Act rules then in effect and is not an indication of future returns. Updated information on the Fund’s performance can be obtained by visiting www.blackrock.com/cash or can be obtained by phone at (800) 441-7450.

California Money Fund

Institutional Shares

ANNUAL TOTAL RETURNS

As of 12/31

During the ten-year period shown in the bar chart, the highest return for a quarter was 0.59% (quarter ended March 31, 2008) and the lowest return for a quarter was 0.00% (quarter ended December 31, 2015).

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As of 12/31/17

Average Annual Total Returns

	1 Year	5 Years	10 Years
California Money Fund—Institutional Shares	0.62%	0.20%	0.35%
	7-Day Yield As of December 31, 2017
California Money Fund—Institutional Shares	1.33%

Current Yield: You may obtain the Fund’s current 7-day yield by calling (800) 441-7450 or by visiting the Fund’s website at www.blackrock.com/cash.

Investment Manager

California Money Fund’s investment manager is BlackRock Advisors, LLC (previously defined as “BlackRock”).

Purchase and Sale of Fund Shares

The Fund is a retail money market fund and is intended only for sale to beneficial owners who are natural persons.

You may purchase or sell shares without paying a sales charge. You may generally purchase or redeem shares of the Fund each day on which the New York Stock Exchange is open.

To purchase or sell shares of the Fund, purchase orders and redemption orders must be transmitted to the Fund’s office in Wilmington, Delaware by telephone (800-441-7450; in Delaware 302-797-2350), through the Fund’s internet-based order entry program, or by such other electronic means as the Fund agrees to in its sole discretion. You have until the close of the federal funds wire (normally 6:00 p.m. Eastern time) to get your purchase money in to the Fund or your purchase order may be cancelled.

The Fund’s initial and subsequent investment minimums generally are as follows, although the Fund’s officers may reduce or waive the minimums in some cases:

	Administration Shares
Minimum Initial Investment	$5,000 (however, financial intermediaries may set a higher minimum for their customers).
Minimum Additional Investment	No subsequent minimum.

Tax Information

California Money Fund anticipates that substantially all of its income dividends will be “exempt-interest dividends,” which are generally exempt from regular federal income taxes.

Payments to Broker/Dealers and Other Financial Intermediaries

If you purchase shares of California Money Fund through a broker-dealer or other financial intermediary, the Fund and BlackRock Investments, LLC, the Fund’s distributor, or its affiliates may pay the financial 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 financial intermediary and your individual financial professional to recommend the Fund over another investment. Ask your individual financial professional or visit your financial intermediary’s website for more information.

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INVESTMENT COMPANY ACT FILE # 811-2354 ^© BlackRock Advisors, LLC SPRO-LIQ-CAM-ADM-0218