Donald Paul Taxay[1] (born May 24, 1933)[2] was an American numismatist and historian, known for the reference works he composed, and for his disappearance at the height of his career.

Coins, in 1963, followed by The U.S. Mint and Coinage in 1966 (which Gilroy Roberts called "the most complete and authoritative treatise on the subject ever written"),[3] An Illustrated History of U.S. Commemorative Coinage in 1967, Money of the American Indians in 1970, and Scott's Comprehensive Catalogue and Encyclopedia of United States Coins in 1971.

He also served as the curator of the Chase Manhattan Bank Money Museum[3] from April 1964 to May 1966.

[5] In 1975, Taxay was appointed senior vice president of First Coinventors, Inc. where he also served as director of their Colonial American Coin Club.

[4] In 2005–2006, the members of the Numismatic Bibliomania Society's mailing list undertook a joint research project to discover what had happened to Taxay.