| Len Petch | |
| Fullname: | Leonard Roy Petch |
| Birth Date: | 24 November 1954 |
| Birth Place: | Traralgon, Victoria |
| Originalteam: | Yarragon |
| Height: | 191 cm |
| Weight: | 91 kg |
| Statsend: | 1977 |
| Years1: | 1973–1977 |
| Club1: | Hawthorn |
| Games Goals1: | 23 (0) |
Leonard Roy Petch (born 24 November 1954) is a former Australian rules footballer who played with Hawthorn in the Victorian Football League (VFL).