| Billy Irwin | |
| Fullname: | William Henry Irwin |
| Birth Date: | 14 October 1884 |
| Birth Place: | Footscray, Victoria |
| Death Place: | North Adelaide |
| Guernsey: | 0 |
| Statsend: | 1911 |
| Years1: | 1911 |
| Games Goals1: | 2 (1) |
William Henry Irwin (14 October 1884 – 17 October 1946) was an Australian rules footballer who played with Melbourne in the Victorian Football League (VFL).[1]
Irwin played two games of football for Melbourne in 1911 and was also a keen cricketer. He enlisted in the artillery in World War I, subsequently becoming a chaplain. He later was a teacher at Trinity Grammar School, Victoria and St Peter's College, Adelaide.[2]