| Ernst Ammann | |
| Birth Place: | Tägerwilen, Switzerland |
| Height: | 188 cm |
| Weight: | 113 kg |
| Sport: | Athletics |
| Event: | Hammer throw |
| Pb: | 68.74 m (1971) |
| Club: | SC Liestal |
| Show-Medals: | yes |
Ernst Ammann (born 24 January 1941) is a retired Swiss hammer thrower. He competed at the 1968 Summer Olympics and placed 19th; his wife Sieglinde competed alongside in the pentathlon and long jump.