    <SEC-DOCUMENT>0001133228-25-012881-index.html : 20251126
    <SEC-HEADER>0001133228-25-012881.hdr.sgml : 20251126
    <ACCEPTANCE-DATETIME>20251126133313
    ACCESSION NUMBER:		0001133228-25-012881
    CONFORMED SUBMISSION TYPE:	N-CSR
    PUBLIC DOCUMENT COUNT:		10
    CONFORMED PERIOD OF REPORT:	20250930
    FILED AS OF DATE:		20251126
    DATE AS OF CHANGE:		20251126
    EFFECTIVENESS DATE:		20251126

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			WESTERN ASSET HIGH INCOME OPPORTUNITY FUND INC.
    		CENTRAL INDEX KEY:			0000910068
    		ORGANIZATION NAME:
    		EIN:				133735236
    		STATE OF INCORPORATION:			MD
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		N-CSR
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-07920
    		FILM NUMBER:		251527861

    	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:	HIGH INCOME OPPORTUNITY FUND INC
    		DATE OF NAME CHANGE:	19941230

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	SMITH BARNEY HIGH INCOME OPPORTUNITY FUND INC
    		DATE OF NAME CHANGE:	19930913

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	SMITH BARNEY HIGH INCOME FUND INC
    		DATE OF NAME CHANGE:	19930802
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-CSR
    <SEQUENCE>1
    <FILENAME>wahiof-efp18900_ncsr.htm
    <DESCRIPTION>WESTERN ASSET HIGH INCOME OPPORTUNITY FUND INC - N-CSR
    <TEXT>
    Document 1 - file: wahiof-efp18900_ncsr.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CODEETH
    <SEQUENCE>2
    <FILENAME>wahiof-efp18900_ex99code.htm
    <DESCRIPTION>CODE OF ETHICS
    <TEXT>
    Document 2 - file: wahiof-efp18900_ex99code.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>3
    <FILENAME>wahiof-efp18900_ex99cert.htm
    <DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
    <TEXT>
    Document 3 - file: wahiof-efp18900_ex99cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.906CERT
    <SEQUENCE>4
    <FILENAME>wahiof-efp18900_ex99906cert.htm
    <DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
    <TEXT>
    Document 4 - file: wahiof-efp18900_ex99906cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>img468cbb851.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: img468cbb851.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>imgeab9f7f42.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: imgeab9f7f42.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>img6e4e726b3.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: img6e4e726b3.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>img9881edb84.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: img9881edb84.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>img3ea624195.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: img3ea624195.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>img9a48d8b36.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: img9a48d8b36.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>