    <SEC-DOCUMENT>0001193125-17-306699-index.html : 20171010
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    <ACCEPTANCE-DATETIME>20171010105338
    ACCESSION NUMBER:		0001193125-17-306699
    CONFORMED SUBMISSION TYPE:	N-CSR/A
    PUBLIC DOCUMENT COUNT:		24
    CONFORMED PERIOD OF REPORT:	20170731
    FILED AS OF DATE:		20171010
    DATE AS OF CHANGE:		20171010
    EFFECTIVENESS DATE:		20171010

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BLACKROCK MUNIYIELD PENNSYLVANIA QUALITY FUND
    		CENTRAL INDEX KEY:			0000891038
    		IRS NUMBER:				223199516
    		STATE OF INCORPORATION:			NJ
    		FISCAL YEAR END:			0630

    	FILING VALUES:
    		FORM TYPE:		N-CSR/A
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-07136
    		FILM NUMBER:		171129290

    	BUSINESS ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809
    		BUSINESS PHONE:		800-441-7762

    	MAIL ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK MUNIYIELD PENNSYLVANIA INSURED FUND
    		DATE OF NAME CHANGE:	20080620

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK MUNIYIELD INSURED PENNSYLVANIA FUND
    		DATE OF NAME CHANGE:	20070803

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK MUNIYIELD PENNSYLVANIA FUND
    		DATE OF NAME CHANGE:	20070611
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-CSR/A
    <SEQUENCE>1
    <FILENAME>d404766dncsra.htm
    <DESCRIPTION>BLACKROCK MUNIYIELD PENNSYLVANIA QUALITY FUND
    <TEXT>
    Document 1 - file: d404766dncsra.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>2
    <FILENAME>d404766dex99cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302
    <TEXT>
    Document 2 - file: d404766dex99cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.906CERT
    <SEQUENCE>3
    <FILENAME>d404766dex99906cert.htm
    <DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
    <TEXT>
    Document 3 - file: d404766dex99906cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.PROXY.POL
    <SEQUENCE>4
    <FILENAME>d404766dex99proxypol.htm
    <DESCRIPTION>PROXY VOTING POLICY
    <TEXT>
    Document 4 - file: d404766dex99proxypol.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CORP.GOV
    <SEQUENCE>5
    <FILENAME>d404766dex99corpgov.htm
    <DESCRIPTION>GLOBAL CORPORATE GOVERNANCE AND ENGAGEMENT PRINCIPLES
    <TEXT>
    Document 5 - file: d404766dex99corpgov.htm

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
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    <DESCRIPTION>GRAPHIC
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    Document 6 - file: g400152black3.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 7 - file: g400152covv.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 8 - file: g400152g1006075917814.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 9 - file: g400152g16z31.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 10 - file: g400152g32m54.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 11 - file: g400152g46q71.jpg

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    <SEQUENCE>12
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    <DESCRIPTION>GRAPHIC
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    Document 12 - file: g400152g57q86.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 13 - file: g400152g87j32.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 14 - file: g402706g03k77.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 15 - file: g402706g09o23.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 16 - file: g402706g26e41.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 17 - file: g402706g41x70.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 18 - file: g402706g42w08.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 19 - file: g402706g43r73.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 20 - file: g402706g65b16.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 21 - file: g402706g98u13.jpg

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    Document 22 - file: g402706leaf.jpg

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    <DESCRIPTION>GRAPHIC
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    Document 23 - file: g426951photo_01mips.jpg

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    <SEQUENCE>24
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: g426951sig_01mips.jpg

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