| Geoff Williamson | |
| Headercolor: | skyblue |
| Nationality: | Australian |
| Sport: | Rowing |
| Birth Date: | 10 July 1923 |
| Birth Place: | Sydney, Australia |
| Death Date: | 17 September 2009 |
Geoffrey Williamson (10 July 1923 - 17 September 2009) was an Australian rower who competed in the 1952 Summer Olympics and in the 1956 Summer Olympics.His senior rowing was done from the Leichhardt Rowing Club in Sydney. In 1952 he was a crew member of the Australian boat which won the bronze medal in the eights event.
Four years later he rowed on the five seat of the Australian boat which was eliminated in the semi-final of the coxless four competition.