As filed with the Securities and Exchange Commission on February 18, 2011.

Registration Nos. 2-99356

811-04367

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A
REGISTRATION STATEMENT
	UNDER THE
	SECURITIES ACT OF 1933	x
	Pre-Effective Amendment No.	¨
	Post-Effective Amendment No. 118	x
REGISTRATION STATEMENT
	UNDER
THE INVESTMENT COMPANY ACT OF 1940
	Amendment No. 119	x

COLUMBIA FUNDS SERIES TRUST I

(Exact Name of Registrant as Specified in Charter)

One Financial Center, Boston, Massachusetts 02111

(Address of Principal Executive Officers) (Zip Code)

617-426-3750

(Registrant’s Telephone Number, Including Area Code)

Scott R. Plummer, Esq.

Columbia Management Investment Advisers, LLC

100 Federal Street

Boston, Massachusetts 02110

with a copy to:

John M. Loder, Esq.	Bruce A. Rosenblum, Esq.
Ropes & Gray LLP	K&L Gates LLP
800 Boylston Street	1601 K St, N.W., Suite 1200
Boston, Massachusetts 02199	Washington, DC, 20006-1600

(Name and Address of Agent for Service)

It is proposed that this filing will become effective:

x Immediately upon filing pursuant to paragraph (b)

¨ on (date) 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.

This Post-Effective Amendment relates solely to the Registrant’s Columbia Contrarian Core Fund, Columbia Disciplined Value Fund, Columbia Dividend Income Fund, Columbia Large Cap Growth Fund, Columbia Small Cap Core Fund series. Information contained in the Registrant’s Registration Statement relating to any other series of the Registrant is neither amended nor superseded hereby.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant, Columbia Funds Series Trust I, certifies that it meets all the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Boston, and The Commonwealth of Massachusetts on the 18^th day of February 2011.

COLUMBIA FUNDS SERIES TRUST I
By:	/s/ J. Kevin Connaughton
Name:	J. Kevin Connaughton
Title:	President

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

SIGNATURES	TITLE	DATE
/s/ J. Kevin Connaughton	President	February 18, 2011
J. Kevin Connaughton	(Principal Executive Officer)
/s/ Michael G. Clarke	Chief Financial Officer	February 18, 2011
Michael G. Clarke	(Principal Financial Officer)
/s/ Joseph F. DiMaria	Chief Accounting Officer	February 18, 2011
Joseph F. DiMaria	(Principal Accounting Officer)
JOHN D. COLLINS*	Trustee	February 18, 2011
John D. Collins
RODMAN L. DRAKE*	Trustee	February 18, 2011
Rodman L. Drake
DOUGLAS A. HACKER*	Trustee	February 18, 2011
Douglas A. Hacker
MICHAEL A. JONES*	Trustee	February 18, 2011
Michael A. Jones
JANET LANGFORD KELLY*	Trustee	February 18, 2011
Janet Langford Kelly

WILLIAM E. MAYER *	Trustee	February 18, 2011
William E. Mayer
CHARLES R. NELSON*	Trustee	February 18, 2011
Charles R. Nelson
JOHN J. NEUHAUSER*	Trustee	February 18, 2011
John J. Neuhauser
JONATHAN PIEL*	Trustee	February 18, 2011
Jonathan Piel
PATRICK J. SIMPSON*	Trustee	February 18, 2011
Patrick J. Simpson
ANNE-LEE VERVILLE*	Trustee	February 18, 2011
Anne-Lee Verville

*By:	/s/ Ryan C. Larrenaga
	Ryan C. Larrenaga**
	Attorney-in-Fact February 18, 2011

** Executed by Ryan C. Larrenaga on behalf of Michael A. Jones pursuant to a Power of Attorney dated January 24, 2011 and incorporated by reference to Post-Effective Amendment No. 116 to the Registration Statement of the Registrant on Form N-1A, filed with the Commission on January 28, 2011, and on behalf of each of the other Trustees pursuant to a Power of Attorney dated May 1, 2010 and incorporated by reference to Post-Effective Amendment No. 105 to the Registration Statement of the Registrant on Form N-1A, filed with the Commission on May 28, 2010.

EXHIBIT INDEX

Exhibit No.	Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxanomny Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase