William Montgomery may refer to:
William Montgomery (Pennsylvania) (1736–1816), American judge, U.S. Congressman for Pennsylvania
William Montgomery (North Carolina) (1789–1844), American physician, U.S. Congressman for North Carolina
William Montgomery (congressman) (1818–1871), U.S. Congressman from Pennsylvania
William Montgomery (New Zealand politician) (1821–1914), New Zealand MP, Minister of Education
William Montgomery, Jr. (1866–1958), New Zealand MP
William Montgomery (cryptographer) (fl. 1918), British cryptographer in World War I
William Bell Montgomery (1829–1904), American farmer, businessman, and editor
Will Montgomery, American football player
Bill Montgomery (born 1949), American football player
Bill Montgomery (cricketer) (1878–1952), English cricketer
Bill Montgomery (Australian footballer) (1915–1988), Australian rules footballer for North Melbourne
Billy Montgomery (born 1937), American educator and politician
William Dale Montgomery, American diplomat