William Mahony may refer to:

• William Mahony (politician, born 1877) (1877–1962), member of the Australian House of Representatives, 1915–1927
• William Mahony (New South Wales politician) (1856–1918), member of the New South Wales Legislative Assembly, 1894–1910
• William Mahony (bishop) (1919–1994), Bishop of the Roman Catholic Diocese of Ilorin
• Bill Mahony (William Victor Mahony, born 1949), Canadian Olympic swimmer

• William Mahoney (disambiguation)

Topics referred to by the same term

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