William Mason
William Mason is the name of the following people:
- William Mason (poet) (1724–1797), English poet, editor and gardener
- William Mason (politician) (1786–1860), American politician
- William Mason (architect) (1810–1897), British-New Zealand architect
- William Mason (composer) (1829–1908), American pianist, composer and music teacher
- William Mason (Opera Manager) , American Opera Manager
- William Mason (singer) (born 1947), British-Austrian opera singer
- William Mason (rower) (born 1950), British rower
- William E. Mason (1850–1921), American politician
- William S. Mason (1832–1899), American politician