UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: December 13, 2010
Accession Number: 0000932471-10-003580
Submission Type: 485APOS
CIK: 0000036405
Company Name: VANGUARD INDEX FUNDS
File Number: 002-56846
REFERENCED SERIES/CLASSES (CONTRACTS)
Series ID
Class/Contract Name
S000002841 Vanguard Extended Market Index Fund
C000007781 Institutional Shares
C000096110 Institutional Plus Shares
Series ID
Class/Contract Name
S000002844 Vanguard Mid-Cap Index Fund
C000007793 Institutional Shares
C000096111 Institutional Plus Shares
Series ID
Class/Contract Name
S000002845 Vanguard Small-Cap Index Fund
C000007797 Institutional Shares
C000096112 Institutional Plus Shares
Series ID
Class/Contract Name
S000002846 Vanguard Small-Cap Growth Index Fund
C000007800 Institutional Shares
Series ID
Class/Contract Name
S000002847 Vanguard Small-Cap Value Index Fund
C000007803 Institutional Shares