    <SEC-DOCUMENT>0001193125-24-231909-index.html : 20241003
    <SEC-HEADER>0001193125-24-231909.hdr.sgml : 20241003
    <ACCEPTANCE-DATETIME>20241003122003
    ACCESSION NUMBER:		0001193125-24-231909
    CONFORMED SUBMISSION TYPE:	N-CSR
    PUBLIC DOCUMENT COUNT:		19
    CONFORMED PERIOD OF REPORT:	20240731
    FILED AS OF DATE:		20241003
    DATE AS OF CHANGE:		20241003
    EFFECTIVENESS DATE:		20241003

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BLACKROCK CALIFORNIA MUNICIPAL INCOME TRUST
    		CENTRAL INDEX KEY:			0001137391
    		ORGANIZATION NAME:
    		IRS NUMBER:				510409109
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1031

    	FILING VALUES:
    		FORM TYPE:		N-CSR
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-10331
    		FILM NUMBER:		241350533

    	BUSINESS ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		STREET 2:		MUTUAL FUND DEPARTMENT
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    		BUSINESS PHONE:		888-825-2257

    	MAIL ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		STREET 2:		MUTUAL FUND DEPARTMENT
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-CSR
    <SEQUENCE>1
    <FILENAME>d879721dncsr.htm
    <DESCRIPTION>BLACKROCK CALIFORNIA MUNICIPAL INCOME TRUST
    <TEXT>
    Document 1 - file: d879721dncsr.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>2
    <FILENAME>d879721dex99cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302
    <TEXT>
    Document 2 - file: d879721dex99cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.906CERT
    <SEQUENCE>3
    <FILENAME>d879721dex99906cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
    <TEXT>
    Document 3 - file: d879721dex99906cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.PROXYPOL
    <SEQUENCE>4
    <FILENAME>d879721dex99proxypol.htm
    <DESCRIPTION>PROXY VOTING POLICY AND PROCEDURES
    <TEXT>
    Document 4 - file: d879721dex99proxypol.htm

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    <TYPE>EX-99.GLOBALCORPGOV
    <SEQUENCE>5
    <FILENAME>d879721dex99globalcorpgov.htm
    <DESCRIPTION>GLOBAL CORPORATE GOVERNANCE & ENGAGEMENT PRINCIPLES
    <TEXT>
    Document 5 - file: d879721dex99globalcorpgov.htm

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    <DOCUMENT>
    <TYPE>EX-99.USCORPGOV
    <SEQUENCE>6
    <FILENAME>d879721dex99uscorpgov.htm
    <DESCRIPTION>CORPORATE GOVERNANCE AND PROXY VOTING GUIDELINES FOR U.S. SECURITIES
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    Document 6 - file: d879721dex99uscorpgov.htm

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    <DESCRIPTION>GRAPHIC
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    <DESCRIPTION>GRAPHIC
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    Document 9 - file: g879721img87f9ad864.gif

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    <DESCRIPTION>GRAPHIC
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    Document 11 - file: g879721imge29526f33.gif

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    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <DESCRIPTION>GRAPHIC
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    Document 14 - file: g879721imgf82ab54b8.jpg

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    <SEQUENCE>15
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g879721sp16a.jpg

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    <SEQUENCE>16
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g879721sp16b.jpg

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    <SEQUENCE>17
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: g879721sp17a.jpg

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    <SEQUENCE>18
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g879721sp38.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 19 - file: g879721sp39.jpg

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