US Post Office—Fredonia is a historic post office building located at Fredonia in Chautauqua County, New York, and within the boundaries of the Fredonia Commons Historic District.

It was designed and built in 1935–36 as a Works Progress Administration project, and is one of a number of post offices in New York State designed by the Office of the Supervising Architect of the Treasury Department, Louis A. Simon.

The central section features three large round arched openings with cast-stone keystones.

The interior features "The Harvest"; a mural from 1937 by artist Arnold Blanch.

[1] Media related to United States Post Office (Fredonia, New York) at Wikimedia Commons