| Ruben McWilliams | |
| Birth Name: | Ruben George McWilliams |
| Birth Date: | 12 June 1901 |
| Birth Place: | Paeroa, New Zealand |
| Death Place: | Auckland, New Zealand |
| Ru Position: | Loose forward |
| Height: | 1.850NaN0 |
| Weight: | 91kg (201lb) |
| Repyears1: | 1928–30 |
| Repcaps1: | 10 |
| Reppoints1: | 3 |
| Ru Provinceyears1: | 1922–30 |
Ruben George McWilliams (12 June 1901 – 27 January 1984) was a New Zealand rugby union player. A loose forward, McWilliams represented at a provincial level, and was a member of the New Zealand national side, the All Blacks, from 1928 to 1930. He played 27 matches for the All Blacks including 10 internationals, scoring 25 points (seven tries and two conversions) in all.[1]