William Seaman (1925–1997) was an American photojournalist.

William Seaman may also refer to:

William B. Seaman (1875–1910), American football and baseball player and coach William Grant Seaman (1866–1944), American Methodist Episcopal minister William Henry Seaman (1842–1915), U.S. federal judge

See also William Seamon, bridge player Bill Seman, CFL player William Seaman Bainbridge