<SEC-DOCUMENT>0001193125-17-158366-index.html : 20170504
<SEC-HEADER>0001193125-17-158366.hdr.sgml : 20170504
<ACCEPTANCE-DATETIME>20170504145258
ACCESSION NUMBER:		0001193125-17-158366
CONFORMED SUBMISSION TYPE:	497K
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20170504
DATE AS OF CHANGE:		20170504
EFFECTIVENESS DATE:		20170504

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK INDEX FUNDS, INC.
		CENTRAL INDEX KEY:			0001026144
		IRS NUMBER:				223483675
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497K
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-15265
		FILM NUMBER:		17813483

	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:	MERRILL LYNCH INDEX FUNDS INC
		DATE OF NAME CHANGE:	19961031
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0001026144
<SERIES-ID>S000003118
<SERIES-NAME>BlackRock Small Cap Index Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000008451
<CLASS-CONTRACT-NAME>Investor A
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000008452
<CLASS-CONTRACT-NAME>Institutional
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497K
<SEQUENCE>1
<FILENAME>d371481d497k.htm
<DESCRIPTION>BLACKROCK SMALL CAP INDEX FUND - INV A, INST
<TEXT>
Document 1 - file: d371481d497k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g371481backcover_restyle.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g371481backcover_restyle.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g371481c000008451_dgf.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g371481c000008451_dgf.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g371481frontcover_restyle.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g371481frontcover_restyle.gif

</DOCUMENT>
</SEC-DOCUMENT>