| Height: | 1.85m (06.07feet) |
| Weight: | 74kg (163lb) |
| Sport: | Athletics |
| Event: | 400 metres |
| Pb: | 400 m – 45.8y (1959) |
| Show-Medals: | yes |
Gordon Raymond Day (born 4 January 1936) is a retired South African sprinter. He competed at the 1960 Summer Olympics in the 400 metres and 4×400 metres relay events and finished fourth in the relay. He was part of the South African team that won the 4×440 yards relay at the 1958 British Empire and Commonwealth Games, while finishing third in the individual 220 yards.