The 1970 South African Grand Prix, formally titled the Fourth AA Grand Prix of South Africa (Afrikaans: Vierde AA Suid-Afrikaanse Grand Prix), was a Formula One motor race held at Kyalami Circuit on 7 March 1970. It was race 1 of 13 in both the 1970 World Championship of Drivers and the 1970 International Cup for Formula One Manufacturers. It was also the 14th and last Formula One victory for triple world champion Jack Brabham, and at age 43, was the last driver to win a Formula One race over the age of 40 until Nigel Mansell at the 1994 Australian Grand Prix.
Two time World Champion and five time Monaco Grand Prix winner Graham Hill, driving a Lotus 49C for Rob Walker, made his return to racing after a life-threatening crash in the 1969 United States Grand Prix.
Qualifying
Qualifying classification
{| class="wikitable sortable" style="font-size: 95%;"
! Pos !! No !! Driver !! Constructor !!Team!!Time!! Gap
|-
! 1
| 1
| Jackie Stewart
| March-Ford
|Tyrrell Racing Organisation
|1:19.3
|
|-
! 2
| 15
| Chris Amon
| March-Ford
|March Engineering
|1:19.3
| -
|-
! 3
| 12
| Jack Brabham
| Brabham-Ford
|Motor Racing Developments Ltd
| 1:19.6
| +0.3
|-
! 4
| 9
| Jochen Rindt
| Lotus-Ford
|Gold Leaf Team Lotus
|1:19.9
| +0.6
|-
! 5
| 17
| Jacky Ickx
| Ferrari
|Scuderia Ferrari SpA SEFAC
|1:20.0
| +0.7
|-
! 6
| 6
| Denny Hulme
| McLaren-Ford
|Bruce McLaren Motor Racing
|1:20.1
| +0.8
|-
! 7
| 7
| John Surtees
| McLaren-Ford
|Team Surtees
|1:20.2
| +0.9
|-
! 8
| 3
| Jean-Pierre Beltoise
| Matra
|Equipe Matra Elf
|1:20.2
| +0.9
|-
! 9
| 16
| Jo Siffert
| March-Ford
|March Engineering
|1:20.2
| +0.9
|-
!10
| 5
| Bruce McLaren
| McLaren-Ford
|Bruce McLaren Motor Racing
|1:20.3
| +1.0
|-
!11
| 8
| Mario Andretti
| March-Ford
|STP Corporation
|1:20.5
| +1.2
|-
!12
| 19
| Jackie Oliver
| BRM
|Owen Racing Organisation
|1:20.9
| +1.6
|-
!13
| 25
| Dave Charlton
| Lotus-Ford
|Scuderia Scribante
|1:20.9
| +1.6
|-
!14
| 10
| John Miles
| Lotus-Ford
|Gold Leaf Team Lotus
|1:21.0
| +1.7
|-
!15
| 14
| Rolf Stommelen
| Brabham-Ford
|Auto Motor Und Sport
|1:21.2
| +1.9
|-
!16
| 20
| Pedro Rodríguez
| BRM
|Owen Racing Organisation
|1:21.3
| +2.0
|-
!17
| 2
| Johnny Servoz-Gavin
| March-Ford
|Tyrrell Racing Organisation
|1:21.4
| +2.1
|-
!18
| 4
| Henri Pescarolo
| Matra
|Equipe Matra Elf
|1:21.5
| +2.2
|-
!19
| 11
| Graham Hill
| Lotus-Ford
|Rob Walker Racing Team
|1:21.6
| +2.3
|-
!20
| 22
| Piers Courage
| De Tomaso-Ford
|Frank Williams Racing Cars
|1:22.0
| +2.7
|-
!21
| 24
| Peter de Klerk
| Brabham-Ford
|Team Gunston
|1:22.7
| +3.4
|-
!22
| 23
| John Love
| Lotus-Ford
|Team Gunston
|1:23.1
| +3.8
|-
!23
| 21
| George Eaton
| BRM
|Owen Racing Organisation
|1:24.6
| +5.3
|}
Classification
{| class="wikitable" style="font-size: 95%;"
! Pos !! No !! Driver !! Constructor !! Laps !! Time/Retired !! Grid !! Points
|-
! 1
| 12
| Jack Brabham
| Brabham-Ford
| 80
| 1:49:34.6
| 3
| 9
|-
! 2
| 6
| Denny Hulme
| McLaren-Ford
| 80
| +8.1
| 6
| 6
|-
! 3
| 1
| Jackie Stewart
| March-Ford
| 80
| +17.1
| 1
| 4
|-
! 4
| 3
| Jean-Pierre Beltoise
| Matra
| 80
| +1:13.1
| 8
| 3
|-
! 5
| 10
| John Miles
| Lotus-Ford
| 79
| +1 lap
| 14
| 2
|-
! 6
| 11
| Graham Hill
| Lotus-Ford
| 79
| +1 lap
| 19
| 1
|-
! 7
| 4
| Henri Pescarolo
| Matra
| 78
| +2 laps
| 18
|
|-
! 8
| 23
| John Love
| Lotus-Ford
| 78
| +2 laps
| 22
|
|-
! 9
| 20
| Pedro Rodríguez
| BRM
| 76
| +4 laps
| 16
|
|-
! 10
| 16
| Jo Siffert
| March-Ford
| 75
| +5 laps
| 9
|
|-
! 11
| 24
| Peter de Klerk
| Brabham-Ford
| 75
| +5 laps
| 21
|
|-
! 12
| 25
| Dave Charlton
| Lotus-Ford
| 73
| Engine
| 13
|
|-
! 13
| 9
| Jochen Rindt
| Lotus-Ford
| 72
| Engine
| 4
|
|-
!
| 17
| Jacky Ickx
| Ferrari
| 60
| Engine
| 5
|
|-
!
| 7
| John Surtees
| McLaren-Ford
| 60
| Engine
| 7
|
|-
!
| 21
| George Eaton
| BRM
| 58
| Engine
| 23
|
|-
!
| 2
| Johnny Servoz-Gavin
| March-Ford
| 57
| Engine
| 17
|
|-
!
| 5
| Bruce McLaren
| McLaren-Ford
| 39
| Engine
| 10
|
|-
!
| 22
| Piers Courage
| De Tomaso-Ford
| 39
| Accident
| 20
|
|-
!
| 8
| Mario Andretti
| March-Ford
| 26
| Overheating
| 11
|
|-
!
| 14
| Rolf Stommelen
| Brabham-Ford
| 23
| Engine
| 15
|
|-
!
| 19
| Jackie Oliver
| BRM
| 22
| Gearbox
| 12
|
|-
!
| 15
| Chris Amon
| March-Ford
| 14
| Overheating
| 2
|
|-
!
| 11
| Brian Redman
| Lotus-Ford
|
| Car raced by Graham Hill
|
|
|-
!colspan="8"|
|}
Championship standings after the race
;Drivers' Championship standings
{| class="wikitable" style="font-size: 95%;"
! Pos
! Driver
! Points
|-
|align="center"| 1
| Jack Brabham
| align="left"| 9
|-
|align="center"| 2
| Denny Hulme
| align="left"| 6
|-
|align="center"| 3
| Jackie Stewart
| align="left"| 4
|-
|align="center"| 4
| Jean-Pierre Beltoise
| align="left"| 3
|-
|align="center"| 5
| John Miles
| align="left"| 2
|-
!colspan=4|Source:
|}
;Constructors' Championship standings
{| class="wikitable" style="font-size: 95%;"
! Pos
! Constructor
! Points
|-
|align="center"| 1
| Brabham-Ford
| align="left"| 9
|-
|align="center"| 2
| McLaren-Ford
| align="left"| 6
|-
|align="center"| 3
| March-Ford
| align="left"| 4
|-
|align="center"| 4
| Matra
| align="left"| 3
|-
|align="center"| 5
| Lotus-Ford
| align="left"| 2
|-
!colspan=4|Source: