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

File Nos.     33-7812

811-04791

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. 46	x

and/or

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940

Amendment No. 48 x

ALLIANCEBERNSTEIN MUNICIPAL INCOME FUND, INC.

(Exact Name of Registrant as Specified in Charter)

1345 Avenue of the Americas, New York, New York 10105

(Address of Principal Executive Office) (Zip Code)

Registrant’s Telephone Number, including Area Code:

(800) 221-5672

Emilie D. Wrapp

AllianceBernstein L.P.

1345 Avenue of the Americas

New York, New York 10105

(Name and address of agent for service)

Copies of communications to:

Kathleen K. Clarke

Seward & Kissel LLP

1200 G Street, N.W.

Suite 350

Washington, DC 20005

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

¨ immediately upon filing pursuant to paragraph (b)

x on February 18, 2011 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 of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness to this amendment to its Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment No. 46 to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City and State of New York, on the 18^th day of February, 2011.

ALLIANCEBERNSTEIN MUNICIPAL INCOME FUND, INC.
By:	Robert M. Keith*
	Robert M. Keith
	President

Pursuant to the requirements of the Securities Act of 1933, as amended this Post-Effective Amendment No. 46 to the Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

	Signature	Title	Date
1)	Principal
	Executive Officer:
	Robert M. Keith*	President and	February 18, 2011
	Robert M. Keith	Chief Executive Officer
2)	Principal Financial
	and Accounting Officer:
	/s/ Joseph J. Mantineo	Treasurer and
	Joseph J. Mantineo	Chief Financial Officer	February 18, 2011

3)	Directors:
	John H. Dobkin*
	Michael J. Downey*
	William H. Foulk, Jr.*
	D. James Guzy*
	Nancy P. Jacklin*
	Robert M. Keith*
	Garry L. Moody*
	Marshall C. Turner, Jr.*
	Earl D. Weiner*
	*By:	/s/ Emilie D. Wrapp	February 18, 2011
		Emilie D. Wrapp
		(Attorney-in-fact)

Index to Exhibits

Exhibit No.	Description of Exhibits
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CALC	XBRL Taxonomy 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