Whitney Eugene Thayer (December 11, 1838, Mendon, Massachusetts – June 27, 1889, Burlington, Vermont) was an American organist and composer.
Thayer gave his first concert just after the installation of the new organ in the Boston Music Hall in 1863.
After returning from Berlin he worked in Boston and later in New York City as an organist.
Apart from a festive cantata and a mass, he composed numerous works for organ, art songs, and vocal quartets.
This article about a United States composer born in the 19th century is a stub.