William Harris Douglas (December 5, 1853 – January 27, 1944) was an American businessman and politician who served two terms as a U.S. Representative from New York from 1901 to 1905.

Born in New York City, Douglas attended private schools and the College of the City of New York.

He entered the exporting and importing trade business.

He served as delegate to the Republican National Conventions in 1908, 1912, and 1916.

This article incorporates public domain material from the Biographical Directory of the United States Congress