VANGUARD OHIO TAX FREE FUND, 497, 2000-01-07

VANGUARD OHIO TAX FREE FUND
497, 2000-01-07

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                            [THE VANGUARD GROUP LOGO]

                         VANGUARD OHIO TAX-EXEMPT FUNDS
                       INSURED LONG-TERM TAX-EXEMPT FUND

                SUPPLEMENT TO THE PROSPECTUS DATED MARCH 30, 1999

PORTFOLIO MANAGER

Christopher  W. Alwine has replaced  Danine  Mueller as the Fund manager for the
Ohio Insured  Long-Term  Tax-Exempt  Fund.  Mr.  Alwine has worked in investment
management since joining Vanguard in 1991 and has managed portfolio  investments
since 1996. He is a Chartered Financial Analyst,  and holds a B.B.A. degree from
Temple University and an M.S. degree from Drexel University.

(C)2000 The Vanguard Group, Inc. All rights reserved.           PS96N-01/07/2000
Vanguard Marketing Corporation, Distributor