F1 Championship leaders
Drivers’ Championship
| # | Grand Prix | Leader | Lead |
|---|---|---|---|
| 1 | South Africa | (GBR) Jim Clark | 3 |
| 2 | Monaco | (GBR) Graham Hill | 4 |
| 3 | Belgium | (GBR) Jim Clark | 3 |
| 4 | France | (GBR) Jim Clark | 10 |
| 5 | Britain | (GBR) Jim Clark | 13 |
| 6 | Netherlands | (GBR) Jim Clark | 19 |
| 7 | Germany | (GBR) Jim Clark | 24 |
| 8 | Italy | (GBR) Jim Clark | 20 |
| 9 | USA | (GBR) Jim Clark | 14 |
| 10 | Mexico | (GBR) Jim Clark | 14 |
- First time as championship leader
- No driver led the championship for the first time in 1965
- Last time as championship leader
- No driver led the championship for the last time in 1965
- Last time as championship leader until…
- 1968 for Jim Clark and Graham Hill
Constructors’ Championship
| # | Grand Prix | Leader | Lead |
|---|---|---|---|
| 1 | South Africa | Lotus-Climax | 3 |
| 2 | Monaco | BRM | 1 |
| 3 | Belgium | BRM | 1 |
| 4 | France | Lotus-Climax | 2 |
| 5 | Britain | Lotus-Climax | 5 |
| 6 | Netherlands | Lotus-Climax | 8 |
| 7 | Germany | Lotus-Climax | 15 |
| 8 | Italy | Lotus-Climax | 12 |
| 9 | USA | Lotus-Climax | 9 |
| 10 | Mexico | Lotus-Climax | 9 |
- First time as championship leader
- No constructor led the championship for the first time in 1965
- Last time as championship leader
- No constructor led the championship for the last time in 1965