| William Mahoney | |
| Office: | 38th Mayor of Saint Paul, Minnesota |
| Term Start: | 1932 |
| Term End: | 1934 |
| Birth Date: | 13 January 1869 |
| Birth Place: | Chicago, Illinois, U.S. |
| Death Place: | Saint Paul, Minnesota, U.S. |
| Resting Place: | Sunset Memorial Park Cemetery, St. Anthony, Minnesota, U.S. |
| Party: | Farmer–Labor |
| Profession: | Politician |
William Mahoney (January 13, 1869 in Chicago, Illinois – August 17, 1952 in Saint Paul, Minnesota) was mayor of Saint Paul, Minnesota from 1932 to 1934. He was founder and editor of Minnesota Union Advocate from 1920 until 1932, when he was elected mayor. Mahoney was a main figure in the formation of the Farmer–Labor Party and ran for the United States House of Representatives under that party name.[1] He was an American of Irish descent.
He is interred at Sunset Memorial Park Cemetery, St. Anthony, Minnesota.