| Simon Jefferies | |
| Birth Date: | 11 July 1955 |
| Birth Place: | Nottingham, Great Britain |
| Height: | 170 cm |
| Weight: | 50 kg |
| Sport: | Rowing |
| Club: | Leander Club, Henley-on-Thames |
Simon H. Jefferies (born 11 July 1955) is a British coxswain. He won a gold medal at the 1980 World Rowing Championships in Hazewinkel with the lightweight men's eight.[1] He was the cox for the British men's eight at the 1988 Summer Olympics where they came fourth.[2] He was part of the British eight at the 1975 World Rowing Championships in Nottingham, the crew finished 9th overall after a third-place finish in the B final.[3]