William Keller may refer to:
William Keller (Medal of Honor) (1876–1963), U.S. Army private and Medal of Honor recipient William Duffy Keller (born 1934), judge William F. Keller (born 1951), Pennsylvania politician Bill Keller (born 1949), executive editor of The New York Times Bill Keller (televangelist), American television evangelist and the host of Live Prayer Billy Keller (born 1947), basketball player
See also Bill Kellar (born 1956), gridiron football wide receiver