Report of Independent Registered Public
Accounting Firm

To the Board of Trustees of Vanguard Index Funds and
Shareholders of
Vanguard Total Stock Market Index Fund
Vanguard Extended Market Index Fund
Vanguard Mid-Cap Index Fund
Vanguard Mid-Cap Growth Index Fund
Vanguard Mid-Cap Value Index Fund
Vanguard Small-Cap Index Fund
Vanguard Small-Cap Growth Index Fund and
Vanguard Small-Cap Value Index Fund

In planning and performing our audits of the financial
statements of Vanguard Total Stock Market Index
Fund, Vanguard Extended Market Index Fund,
Vanguard Mid-Cap Index Fund, Vanguard Mid-Cap
Growth Index Fund, Vanguard Mid-Cap Value Index
Fund, Vanguard Small-Cap Index Fund, Vanguard
Small-Cap Growth Index Fund, and Vanguard Small-
Cap Value Index Fund (eight of the funds constituting
Vanguard Index Funds, hereafter collectively referred to
as the "Funds") as of and for the year ended December
31, 2022, in accordance with the standards of the
Public Company Accounting Oversight Board (United
States) (PCAOB), we considered the Funds' internal
control over financial reporting, including controls over
safeguarding securities, as a basis for designing our
auditing procedures for the purpose of expressing our
opinion on the financial statements and to comply with
the requirements of Form N-CEN, but not for the
purpose of expressing an opinion on the effectiveness
of the Funds' internal control over financial reporting.
Accordingly, we do not express an opinion on the
effectiveness of the Funds' internal control over
financial reporting.

The management of the Funds is responsible for
establishing and maintaining effective internal control
over financial reporting. In fulfilling this responsibility,
estimates and judgments by management are required
to assess the expected benefits and related costs of
controls. A company's internal control over financial
reporting is a process designed to provide reasonable
assurance regarding the reliability of financial reporting
and the preparation of financial statements for external
purposes in accordance with generally accepted
accounting principles. A company's internal control over
financial reporting includes those policies and
procedures that (1) pertain to the maintenance of
records that, in reasonable detail, accurately and fairly
reflect the transactions and dispositions of the assets of
the company; (2) provide reasonable assurance that
transactions are recorded as necessary to permit
preparation of financial statements in accordance with
generally accepted accounting principles, and that
receipts and expenditures of the company are being
made only in accordance with authorizations of
management and directors of the company; and (3)
provide reasonable assurance regarding prevention or
timely detection of unauthorized acquisition, use or
disposition of a company's assets that could have a
material effect on the financial statements.

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk
that controls may become inadequate because of
changes in conditions, or that the degree of compliance
with the policies or procedures may deteriorate.

A deficiency in internal control over financial reporting
exists when the design or operation of a control does
not allow management or employees, in the normal
course of performing their assigned functions, to
prevent or detect misstatements on a timely basis. A
material weakness is a deficiency, or a combination of
deficiencies, in internal control over financial reporting,
such that there is a reasonable possibility that a
material misstatement of the company's annual or
interim financial statements will not be prevented or
detected on a timely basis.

Our consideration of the Funds' internal control over
financial reporting was for the limited purpose described
in the first paragraph and would not necessarily
disclose all deficiencies in internal control over financial
reporting that might be material weaknesses under
standards established by the PCAOB. However, we
noted no deficiencies in the Funds' internal control over
financial reporting and its operation, including controls
over safeguarding securities, that we consider to be a
material weakness as defined above as of December
31, 2022.

This report is intended solely for the information and
use of the Board of Trustees of Vanguard Index Funds
and the Securities and Exchange Commission and is
not intended to be and should not be used by anyone
other than these specified parties.


/s/ PricewaterhouseCoopers LLP
Philadelphia, Pennsylvania
February 16, 2023