| Thomas Ahrens | |
| Nocat Wdimage: | yes |
| Birth Place: | Mölln, Germany |
| Height: | 1.63 m |
| Weight: | 50 kg |
| Sport: | Rowing |
| Club: | Ratzeburger RC |
| Show-Medals: | yes |
Thomas Ahrens (born 27 May 1948) is a retired German coxswain who was most successful in the eights. In this event he won a silver medal at the 1964 Summer Olympics, a world title in 1962, and two European titles in 1963 and 1964.