As filed with the U.S. Securities and Exchange Commission on April 14, 2011

Securities Act File No. 2-96408

Investment Company Act File No. 811-04254

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. 164	x

and/or

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 165
(Check appropriate box or boxes)

Legg Mason Partners Income Trust

(Exact Name of Registrant as Specified in Charter)

55 Water Street, New York, New York	10041
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s Telephone Number, including Area Code (800) 451-2010

Robert I. Frenkel

Legg Mason Partners Income Trust

100 First Stamford Place

Stamford, Connecticut 06902

(Name and Address of Agent for Service)

COPY TO:

Roger P. Joseph, Esq.

Bingham McCutchen LLP

One Federal Street

Boston, Massachusetts 02110

Continuous

(Approximate Date of Proposed Offering)

It is proposed that this filing will become effective:

x immediately upon filing pursuant to paragraph (b)

¨ on                      pursuant to paragraph (b)

¨ 60 days after filing pursuant to paragraph (a)(1)

¨ on                      pursuant to paragraph (a)(1)

¨ 75 days after filing pursuant to paragraph (a)(2)

¨ on                      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 filing relates solely to Legg Mason Western Asset Intermediate Maturity New York Municipals Fund, Legg Mason Western Asset Intermediate Maturity California Municipals Fund and Legg Mason Western Asset Massachusetts Municipals Fund.

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, the Registrant, LEGG MASON PARTNERS INCOME TRUST, hereby certifies that it meets all the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act and has duly caused this Post-Effective Amendment to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, State of New York on this 14th day of April, 2011.

LEGG MASON PARTNERS INCOME TRUST, on behalf of its series:

Legg Mason Western Asset Intermediate Maturity New York Municipals Fund

Legg Mason Western Asset Intermediate Maturity California Municipals Fund

Legg Mason Western Asset Massachusetts Municipals Fund

By:	/s/ R. Jay Gerken
	R. Jay Gerken
	President and Chief Executive Officer

WITNESS our hands on the date set forth below.

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment to the Registration Statement has been signed below by the following persons in the capacities indicated below on April 14, 2011.

Signature	Title
/s/ R. Jay Gerken	President, Chief Executive Officer and Trustee
R. Jay Gerken
/s/ Kaprel Ozsolak	Chief Financial Officer
Kaprel Ozsolak
Elliott J. Berv*	Trustee
Elliott J. Berv
A. Benton Cocanougher*	Trustee
A. Benton Cocanougher
Jane F. Dasher*	Trustee
Jane F. Dasher
Mark T. Finn*	Trustee
Mark T. Finn
Rainer Greeven*	Trustee
Rainer Greeven
Stephen R. Gross*	Trustee
Stephen R. Gross

- 3 -

Richard E. Hanson, Jr.*	Trustee
Richard E. Hanson, Jr.
Diana R. Harrington*	Trustee
Diana R. Harrington
Susan M. Heilbron*	Trustee
Susan M. Heilbron
Susan B. Kerley*	Trustee
Susan B, Kerley
Alan G. Merten*	Trustee
Alan G. Merten
R. Richardson Pettit*	Trustee
R. Richardson Pettit

*By:	/s/ R. Jay Gerken
	R. Jay Gerken

* Attorney-in-Fact, pursuant to Power of Attorney.

- 4 -

EXHIBIT INDEX

Index No.	Description of Exhibit
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