MAY 3, 2000
SECURITIES AND EXCHANGE COMMISSION
JUDICIARY PLAZA
450 FIFTH STREET, N.W.
WASHINGTON, D.C.
RE: CALVERT MUNICIPAL FUND, INC.
33-44968 AND 811-6525
IN LIEU OF FILING UNDER PARAGRAPH (B) OR (C) OF SECTION 497, THE
ABOVE REGISTRANT IS HEREBY FILING A CERTIFICATION THAT:
(1) THE FORM OF PROSPECTUSES AND STATEMENT OF ADDITIONAL
INFORMATION THAT WOULD HAVE BEEN FILED UNDER PARAGRAPH (B) OR (C) OF
SECTION 497 WOULD NOT HAVE DIFFERED FROM THOSE CONTAINED IN THE MOST
RECENT REGISTRATION STATEMENT (EFFECTIVE APRIL 30, 2000) OR AMENDMENT; AND
(2) THE TEXT OF THE MOST RECENT REGISTRATION STATEMENT (EFFECTIVE
APRIL 30, 2000) HAS BEEN FILED ELECTRONICALLY.
IF YOU HAVE QUESTIONS OR REQUIRE FURTHER INFORMATION, PLEASE CONTACT
ME AT 301-951-4881.
SINCERELY,
/S/SUSAN WALKER BENDER
SUSAN WALKER BENDER
ASSOCIATE GENERAL COUNSEL
