William Elmer Harmon, also known as Jedediah Tingle, was a white real estate developer and philanthropist. He founded the William E. Harmon Foundation, which was noted for its support of African-American artists.

The Harmon Foundation was established in 1921 by white real-estate developer William E. Harmon (1862–1928). The Foundation originally supported a variety of causes, including playgrounds and nursing programs, but is best known for having funded and collected the work of a large group of African-American artists, many of whom would go on to become widely recognized. After 1947, the foundation expanded its work in the arts to include supporting African and Afro-diasporic artists. The foundation was among the first organizations in the United States to support opportunities for contemporary African-American and African artists to travel between the United States and Africa to study, exhibit their work, and meet other artists. Mary B. Brady was the director of the foundation from 1922 until 1967.