<SEC-DOCUMENT>0000940400-17-000107-index.html : 20170227
<SEC-HEADER>0000940400-17-000107.hdr.sgml : 20170227
<ACCEPTANCE-DATETIME>20170227115430
ACCESSION NUMBER:		0000940400-17-000107
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20161231
FILED AS OF DATE:		20170227
DATE AS OF CHANGE:		20170227
EFFECTIVENESS DATE:		20170227

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BlackRock Utility & Infrastructure Trust
		CENTRAL INDEX KEY:			0001528988
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-22606
		FILM NUMBER:		17640326

	BUSINESS ADDRESS:	
		STREET 1:		55 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10055
		BUSINESS PHONE:		(800) 882-0052

	MAIL ADDRESS:	
		STREET 1:		55 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10055
</SEC-HEADER>
<DOCUMENT>
<TYPE>NSAR-B
<SEQUENCE>1
<FILENAME>brUtility.fil
<TEXT>
Document 1 - file: brUtility.fil

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>brUtility77b.txt
<TEXT>
Document 2 - file: brUtility77b.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q1 OTHR EXHB
<SEQUENCE>3
<FILENAME>brUtility77q1.txt
<TEXT>
Document 3 - file: brUtility77q1.txt

</DOCUMENT>
</SEC-DOCUMENT>