Securities Act File No. 002-88912

Investment Company Act File No. 811-03942

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. 62	x
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 63	x

LORD ABBETT MUNICIPAL INCOME FUND, INC.

(Exact Name of Registrant as Specified in Charter)

90 Hudson Street, Jersey City, New Jersey	07302-3973
(Address of Principal Executive Office)	(Zip Code)

Registrant’s Telephone Number, including Area Code:   (800) 201-6984

Thomas R. Phillips, Esq.

Vice President and Assistant Secretary

90 Hudson Street, Jersey City, New Jersey 07302-3973

(Name and Address of Agent for Service)

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

¨ immediately upon filing pursuant to paragraph (b)

x on February 22, 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 of this Post-Effective Amendment to its Registration Statement under Rule 485(b) under the Securities Act and had duly caused this Post-Effective Amendment to be signed on its behalf by the undersigned, duly authorized, in the City of Jersey City, and State of New Jersey on the 22nd day of February, 2011.

LORD ABBETT MUNICIPAL INCOME FUND, INC.
	BY:	/s/ Thomas R. Phillips
		Thomas R. Phillips Vice President and Assistant Secretary
	BY:	/s/ Joan A. Binstock
		Joan A. Binstock Chief Financial Officer and Vice President

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

Signatures	Title	Date
Robert S. Dow*	Chairman and Director	February 22, 2011
Robert S. Dow
Daria L. Foster*	President and Director	February 22, 2011
Daria L. Foster
E. Thayer Bigelow*	Director	February 22, 2011
E. Thayer Bigelow
Robert B. Calhoun, Jr.*	Director	February 22, 2011
Robert B. Calhoun, Jr.
Evelyn E. Guernsey*	Director	February 22, 2011
Evelyn E. Guernsey
Julie A. Hill*	Director	February 22, 2011
Julie A. Hill
Franklin W. Hobbs*	Director	February 22, 2011
Franklin W. Hobbs
Thomas J. Neff*	Director	February 22, 2011
Thomas J. Neff
James L.L. Tullis*	Director	February 22, 2011
James L.L. Tullis

*BY:	/s/ Thomas R. Phillips
	Thomas R. Phillips
	Attorney-in-Fact*

POWER OF ATTORNEY

Each person whose signature appears below on this Registration Statement hereby constitutes and appoints Lawrence H. Kaplan, Lawrence B. Stoller, John K. Forst, and Thomas R. Phillips, each of them, with full power to act without the other, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities (until revoked in writing) to sign any and all Registration Statements of each Fund enumerated on Exhibit A hereto for which such person serves as a Director/Trustee (including Registration Statements on Forms N-1A and N-14 and any amendments thereto), and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

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 dates indicated.

Signatures	Title	Date
	Chairman, CEO and Director/Trustee
/s/ Robert S. Dow			January 27, 2011
Robert S. Dow
/s/ Daria L. Foster	President and Director/Trustee		January 27, 2011
Daria L. Foster
/s/ E. Thayer Bigelow	Director/Trustee		January 27, 2011
E. Thayer Bigelow
/s/ Robert B. Calhoun, Jr.	Director/Trustee		January 27, 2011
Robert B. Calhoun, Jr.
/s/ Evelyn E. Guernsey	Director/Trustee		January 27, 2011
Evelyn E. Guernsey
/s/ Julie A. Hill	Director/Trustee		January 27, 2011
Julie A. Hill
/s/ Franklin W. Hobbs	Director/Trustee		January 27, 2011
Franklin W. Hobbs
/s/ Thomas J. Neff	Director/Trustee		January 27, 2011
Thomas J. Neff
/s/ James L.L. Tullis	Director/Trustee		January 27, 2011
James L.L. Tullis

EXHIBIT A

Lord Abbett Affiliated Fund, Inc.

Lord Abbett Blend Trust

Lord Abbett Bond-Debenture Fund, Inc.

Lord Abbett Developing Growth Fund, Inc.

Lord Abbett Global Fund, Inc.

Lord Abbett Investment Trust

Lord Abbett Mid-Cap Value Fund, Inc.

Lord Abbett Municipal Income Fund, Inc.

Lord Abbett Municipal Income Trust

Lord Abbett Research Fund, Inc.

Lord Abbett Securities Trust

Lord Abbett Series Fund, Inc.

Lord Abbett Stock Appreciation Fund

Lord Abbett U.S. Government & Government Sponsored Enterprises Money Market Fund, Inc.

EXHIBIT INDEX

Exhibit No.	Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	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