| Rex Ritchie | |
| Fullname: | Reginald Francis Ritchie |
| Birth Date: | 24 December 1914 |
| Birth Place: | Croydon, Victoria |
| Death Date: | [1] |
| Death Place: | Ringwood East, Victoria |
| Originalteam: | Preston (VFA) |
| Height: | 177 cm |
| Weight: | 75 kg |
| Statsend: | 1947 |
| Years1: | 1934 |
| Club1: | Preston (VFA) |
| Games Goals1: | 6 (0) |
| Years2: | 1936–1942, 1946–1947 |
| Club2: | South Melbourne |
| Games Goals2: | 89 (1) |
Reginald Francis "Rex" Ritchie (24 December 1914 – 1 April 2006) was an Australian rules footballer who played with South Melbourne in the VFL. Ritchie was a defender and won the South Melbourne Best and Fairest award in 1941.
Ritchie's time at South Melbourne was interrupted by his service in the Australian Army during World War II.[2]