    <SEC-DOCUMENT>0001133228-25-001536-index.html : 20250227
    <SEC-HEADER>0001133228-25-001536.hdr.sgml : 20250227
    <ACCEPTANCE-DATETIME>20250227113947
    ACCESSION NUMBER:		0001133228-25-001536
    CONFORMED SUBMISSION TYPE:	N-CSR
    PUBLIC DOCUMENT COUNT:		11
    CONFORMED PERIOD OF REPORT:	20241231
    FILED AS OF DATE:		20250227
    DATE AS OF CHANGE:		20250227
    EFFECTIVENESS DATE:		20250227

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Western Asset Investment Grade Income Fund Inc.
    		CENTRAL INDEX KEY:			0000075398
    		ORGANIZATION NAME:
    		IRS NUMBER:				952808650
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		N-CSR
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-02351
    		FILM NUMBER:		25675452

    	BUSINESS ADDRESS:
    		STREET 1:		620 EIGHTH AVENUE
    		STREET 2:		47TH FLOOR
    		CITY:			NEW YORK
    		STATE:			MD
    		ZIP:			10018
    		BUSINESS PHONE:		8887770102

    	MAIL ADDRESS:
    		STREET 1:		620 EIGHTH AVENUE
    		STREET 2:		47TH FLOOR
    		CITY:			NEW YORK
    		STATE:			MD
    		ZIP:			10018

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Western Asset Income Fund
    		DATE OF NAME CHANGE:	20050629

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	PACIFIC AMERICAN INCOME SHARES INC
    		DATE OF NAME CHANGE:	19920703
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-CSR
    <SEQUENCE>1
    <FILENAME>waigif-efp14264_ncsr.htm
    <DESCRIPTION>WESTERN ASSET INVESTMENT GRADE INCOME FUND INC. (PAI) - N-CSR
    <TEXT>
    Document 1 - file: waigif-efp14264_ncsr.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CODE
    <SEQUENCE>2
    <FILENAME>waigif-efp14264_ex99code.htm
    <DESCRIPTION>CODE OF ETHICS
    <TEXT>
    Document 2 - file: waigif-efp14264_ex99code.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>3
    <FILENAME>waigif-efp14264_ex99cert.htm
    <DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 ATTACHED HERETO
    <TEXT>
    Document 3 - file: waigif-efp14264_ex99cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.906CERT
    <SEQUENCE>4
    <FILENAME>waigif-efp14264_ex99906cert.htm
    <DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 ATTACHED HERETO
    <TEXT>
    Document 4 - file: waigif-efp14264_ex99906cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>img0ed3221b1.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: img0ed3221b1.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>img30c8427f2.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: img30c8427f2.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>img6ddcd5bb3.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: img6ddcd5bb3.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>img2c592fc94.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: img2c592fc94.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>img6a201b775.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: img6a201b775.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>imgbe9911eb6.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: imgbe9911eb6.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>imgd5dcb83b7.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: imgd5dcb83b7.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>