As filed with the Securities and Exchange Commission on June 18, 2015

Securities Act File No. 33-26305

Investment Company Act File No. 811-05742

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549
__________________

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	☒
Pre-Effective Amendment No.	☐
Post-Effective Amendment No. 469	☒
and/or
REGISTRATION STATEMENT UNDER THE
INVESTMENT COMPANY ACT OF 1940	☒
Amendment No. 471	☒

(Check appropriate box or boxes)
__________________

BLACKROCK FUNDS^SM

(Exact Name of Registrant as Specified in Charter)

100 Bellevue Parkway, Wilmington, Delaware 19809

(Address of Principal Executive Office)

Registrant’s Telephone Number, including Area Code (800) 441-7762

John M. Perlowski
BlackRock Funds
55 East 52^nd Street
New York, New York 10055
United States of America

(Name and Address of Agent for Service)

Copies to:  

Counsel for the Fund:
John A. MacKinnon, Esq.	Benjamin Archibald, Esq.
Sidley Austin LLP	BlackRock Advisors, LLC
787 Seventh Avenue	55 East 52nd Street
New York, New York 10019-6018	New York, New York 10055

__________________

It is proposed that this filing will become effective (check appropriate box)

☐	immediately upon filing pursuant to paragraph (b)
☒	on July 17, 2015 pursuant to paragraph (b)
☐	60 days after filing pursuant to paragraph (a)(1)
☐	on (date) pursuant to paragraph (a)(1)
☐	75 days after filing pursuant to paragraph (a)(2)
☐	on (date) 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.
Title of Securities Being Registered: Shares of Beneficial Interest, par value $0.001 per share.

Explanatory Note

This Post-Effective Amendment No. 469 under the Securities Act of 1933, as amended (the “Securities Act”) (Amendment No. 471 under the Investment Company Act of 1940, as amended (the “1940 Act”)) to the registration statement on Form N-1A (the “Registration Statement”) of BlackRock Funds^SM (the “Registrant”) is being filed pursuant to paragraph (b)(1)(iii) of Rule 485 under the Securities Act solely for the purpose of delaying, until July 17, 2015, the effectiveness of the registration statement for BlackRock Credit Opportunities Portfolio (the “Fund”), filed in Post-Effective Amendment No. 171 on June 2, 2011, pursuant to paragraph (a) of Rule 485 under the Securities Act.

This Post-Effective Amendment No. 469 incorporates by reference the information contained in Parts A, B and C of Post-Effective Amendment No. 171 to the Registrant’s Registration Statement.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended (the “Securities Act”), and the Investment Company Act of 1940, as amended, BlackRock Funds^SM (the “Registrant”) certifies that it meets all the requirements for the effectiveness of this Registration Statement pursuant to Rule 485(b)(1)(iii) under the Securities Act and duly caused this Post-Effective Amendment No. 469 to the Registration Statement on Form N-1A of the Registrant, to be signed on behalf of the Registrant by the undersigned, duly authorized, in the City of New York and the State of New York on the 18^th day of June, 2015.

BLACKROCK FUNDSSM, on behalf of its series, BlackRock Credit Opportunities Portfolio
By:	/s/ John M. Perlowski
	John M. Perlowski
	President and Chief Executive Officer

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment No. 469 to the Registration Statement on Form N-1A of the Registrant has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title	Date
/s/ John M. Perlowski	President and Chief Executive Officer (Principal Executive Officer)	June 18, 2015
John M. Perlowski
/s/ Neal J. Andrews	Chief Financial Officer (Principal Financial and Accounting Officer)	June 18, 2015
Neal J. Andrews
David O. Beim*	Trustee
David O. Beim
Collette Chilton*	Trustee
Collette Chilton
Frank J. Fabozzi*	Trustee
Frank J. Fabozzi
Dr. Matina S. Horner*	Trustee
Dr. Matina S. Horner
Rodney D. Johnson*	Trustee
Rodney D. Johnson
Herbert I. London*	Trustee
Herbert I. London
Cynthia A. Montgomery*	Trustee
Cynthia A. Montgomery
Joseph P. Platt*	Trustee
Joseph P. Platt
Robert C. Robb, Jr.*	Trustee
Robert C. Robb, Jr.

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	Toby Rosenblatt*	Trustee
	Toby Rosenblatt
	Mark Stalnecker*	Trustee
	Mark Stalnecker
	Kenneth L. Urish*	Trustee
	Kenneth L. Urish
	Frederick W. Winter*	Trustee
	Frederick W. Winter
	Barbara G. Novick*	Trustee
	Barbara G. Novick
*By:	/s/ Janey Ahn		June 18, 2015
	Janey Ahn (Attorney-In-Fact)

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