<SEC-DOCUMENT>0001133228-25-007664-index.html : 20250729
<SEC-HEADER>0001133228-25-007664.hdr.sgml : 20250729
<ACCEPTANCE-DATETIME>20250729083734
ACCESSION NUMBER:		0001133228-25-007664
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		9
CONFORMED PERIOD OF REPORT:	20250531
FILED AS OF DATE:		20250729
DATE AS OF CHANGE:		20250729
EFFECTIVENESS DATE:		20250729

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Western Asset Investment Grade Opportunity Trust Inc.
		CENTRAL INDEX KEY:			0001462586
		ORGANIZATION NAME:           	
		EIN:				000000000
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1130

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-22294
		FILM NUMBER:		251157782

	BUSINESS ADDRESS:	
		STREET 1:		620 EIGHTH AVENUE
		STREET 2:		47TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018
		BUSINESS PHONE:		888-777-0102

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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Western Asset Investment Grade Defined Opportunity Trust Inc.
		DATE OF NAME CHANGE:	20090423
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>waigoti-efp16604_ncsrs.htm
<DESCRIPTION>WESTERN ASSET INVESTMENT GRADE OPPORTUNITY TRUST INC - N-CSRS
<TEXT>
Document 1 - file: waigoti-efp16604_ncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>waigoti-efp16604_ex99cert.htm
<DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
<TEXT>
Document 2 - file: waigoti-efp16604_ex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>waigoti-efp16604_ex99906cert.htm
<DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
<TEXT>
Document 3 - file: waigoti-efp16604_ex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>img1ad90c3c5.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: img1ad90c3c5.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>img017b40752.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: img017b40752.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>img50c8ce681.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: img50c8ce681.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>img65a447e24.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: img65a447e24.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>img70b96eea6.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: img70b96eea6.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>img18553da63.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: img18553da63.gif

</DOCUMENT>
</SEC-DOCUMENT>