| Rupert Williamson | |
| Full Name: | Rupert Henry Williamson |
| Birth Date: | 22 November 1886 |
| Birth Place: | Transvaal, South Africa |
| Death Place: | Sabie, Transvaal, South Africa |
| School: | St. Andrew's College |
| University: | Trinity College |
| Position: | Scrum-half |
| Repyears1: | 1908–09 |
| Repcaps1: | 5 |
| Reppoints1: | 6 |
Rupert Henry Williamson (22 November 1886 – 16 March 1946) was an England rugby union international.
Williamson attended St. Andrew's College, Grahamstown, and went to Trinity College, Oxford, as a Rhodes Scholar.[1] His halfback partner in schoolboy rugby, W. K. Flemmer, was another Rhodes Scholar, and the pair continued their association in varsity rugby, also touring together with the Barbarians. He played further club rugby for Blackheath and gained five England caps, scoring a try on debut against Wales at Bristol.[2]
Returning to South Africa in 1909, Williamson became a mine manager at the Glynn's Lydenburg gold mine.[3]