| Martin Ratz | |
| Fullname: | Martin Wilhelm Ratz |
| Birth Date: | 14 October 1887 |
| Birth Place: | Collingwood, Victoria |
| Death Place: | St Kilda, Victoria |
| Originalteam: | Scotch College |
| Position: | Rover |
| Statsend: | 1910 |
| Years1: | 1908–1910 |
| Games Goals1: | 42 (52) |
Martin Wilhelm Ratz (14 October 1887 – 8 August 1943) was an Australian rules footballer who played with University. He was also played cricket and football at Scotch College, Melbourne, before becoming a doctor.[1]