| Type: | NC |
| Country: | South Africa |
| Flag Suffix: | 1928 |
| Grand Prix: | South African |
| Official Name: | 12th International RAC Grand Prix of South Africa |
| Location: | Prince George Circuit, East London, South Africa |
| Date: | 1 January |
| Year: | 1966 |
| Course: | Temporary road circuit |
| Course Mi: | 2.436 |
| Course Km: | 3.91 |
| Distance Laps: | 60 |
| Distance Mi: | 145.769 |
| Distance Km: | 234.592 |
| Pole Driver: | Jack Brabham |
| Pole Country: | Australia |
| Pole Team: | Brabham-Repco |
| Pole Time: | 1:25.1 |
| Fast Driver: | Jack Brabham |
| Fast Team: | Brabham-Repco |
| Fast Time: | 1:25.2 |
| Fast Country: | Australia |
| First Driver: | Mike Spence |
| First Country: | UK |
| First Team: | Lotus-Climax |
| Second Driver: | Jo Siffert |
| Second Country: | Switzerland |
| Second Team: | Brabham-BRM |
| Third Driver: | Peter Arundell |
| Third Country: | UK |
| Third Team: | Lotus-Climax |
The 1966 South African Grand Prix, formally titled the 12th International RAC Grand Prix of South Africa (Afrikaans: 12de Internasionale RAC Grand Prix van Suid-Afrika[1]), was a non-championship Formula One motor race held on 1 January 1966 at Prince George Circuit, East London, South Africa. The race, run over 60 laps of the circuit, was won by British driver Mike Spence in a works Lotus-Climax. Spence won by two laps from the private Brabham-BRM of Swiss driver Jo Siffert, with fellow Briton Peter Arundell third in the other works Lotus-Climax.
