Post-effective Amendment (investment Company, Rule 485(b)) (485bpos)

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. 78 (File No. 333-131683)		x

and/or

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940


Amendment No. 83 (File No. 811-21852)		x

Columbia Funds Series Trust II

50606 Ameriprise Financial Center

Minneapolis, MN 55474

Scott R. Plummer

5228 Ameriprise Financial Center

Minneapolis, MN 55474

(612) 671-1947

Approximate Date of Proposed Public Offering:

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

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.

SIGNATURES

Pursuant to the requirements of the Securities Act and the Investment Company Act, the Registrant, COLUMBIA FUNDS SERIES TRUST II, certifies that it meets all of the requirements for effectiveness of this Amendment to its Registration Statement under Rule 485(b) 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 Boston, and State of Massachusetts on the 19 ^th day of December, 2012.


COLUMBIA FUNDS SERIES TRUST II

By		/s/ J. Kevin Connaughton
		J. Kevin Connaughton President

Pursuant to the requirements of the Securities Act, this Amendment to the Registration Statement has been signed below by the following persons in the capacities indicated on the 19 ^th day of December, 2012.


Signature	Capacity	Signature	Capacity

/s/ J. Kevin Connaughton J. Kevin Connaughton	President (Principal Executive Officer)	/s/ William A. Hawkins* William A. Hawkins	Trustee

/s/ Michael G. Clarke Michael G. Clarke	Chief Financial Officer (Principal Financial Officer)	/s/ R. Glenn Hilliard* R. Glenn Hilliard	Trustee

/s/ Paul D. Pearson Paul D. Pearson	Chief Accounting Officer (Principal Accounting Officer)	/s/ Catherine James Paglia* Catherine James Paglia	Trustee

/s/ Stephen R. Lewis, Jr.* Stephen R. Lewis, Jr.	Chair of the Board	/s/ Leroy C. Richie* Leroy C. Richie	Trustee

/s/ Kathleen A. Blatz* Kathleen A. Blatz	Trustee	/s/ Anthony M. Santomero* Anthony M. Santomero	Trustee

/s/ Edward J. Boudreau, Jr.* Edward J. Boudreau, Jr.	Trustee	/s/ Minor M. Shaw* Minor M. Shaw	Trustee

/s/ Pamela G. Carlton* Pamela G. Carlton	Trustee	/s/ Alison Taunton-Rigby* Alison Taunton-Rigby	Trustee

/s/ William P. Carmichael* William P. Carmichael	Trustee	/s/ William F. Truscott* William F. Truscott	Trustee

/s/ Patricia M. Flynn* Patricia M. Flynn	Trustee

*	Signed pursuant to Directors/Trustees Power of Attorney, dated June 8, 2011, filed electronically on or about June 16, 2011 as Exhibit (q) to Registrant’s Post-Effective Amendment No. 28 to Registration Statement No. 333-131683, by:

/s/ Scott R. Plummer

Scott R. Plummer

Exhibit Index