| Billy Monagle | |
| Fullname: | William David Monagle |
| Birth Date: | 26 November 1876 |
| Birth Place: | Port Melbourne, Victoria |
| Death Place: | Prahran, Victoria |
| Originalteam: | Port Melbourne |
| Statsend: | 1899 |
| Years1: | 1899 |
| Games Goals1: | 17 (0) |
Billy Monagle (26 November 1876 – 28 February 1941) was an Australian rules footballer who played with Carlton in the Victorian Football League (VFL).[1]