William Fitzgerald
William Fitzgerald or William FitzGerald is the name of the following people:
- William Fitzgerald (politician) (1799–1864), American politician
- William FitzGerald (Judge) (1906–1974), Irish judge
- William FitzGerald-de Ros, 23rd Baron de Ros (1797–1874), British nobleman and officer
- William F. Fitzgerald (1846–1903), American lawyer
- William J. Fitzgerald (1887–1947), American politician
- William James Fitzgerald (* 1861), American politician
- William S. Fitzgerald (1880–1937), American politician
- William T. Fitzgerald (1858–1939), American politician
- William Vincent Fitzgerald (1867–1929), Australian botanist
