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

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

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                            [THE VANGAURD GROUP LOGO]

                     VANGUARD PENNSYLVANIA 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
Pennsylvania  Insured  Long-Term  Tax-Exempt  Fund.  Mr.  Alwine  has  worked in
investment  management  for  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.           PS77N-01/07/2000
Vanguard Marketing Corporation, Distributor