| Date | Sunday 12 September 1965 |
| Start time | 14:00 |
| Event | Italian GP |
| Circuit | Monza |
| Event Format | Race of 76 laps |
| Race | 14 of 16 |
| Championship race | 139 |
| Laps | 76 |
| Circuit Perimeter | 5750 m |
| Race Distance | 5750 × 76 = 437.000 km |
| Grid Format | 3-2-3-2 |
| Pole Position | Left |
| First Corner | Right |
| Track Direction | Clockwise |
| Weather | Sunny, Mild, Dry |
| Entries | 23 |
| Qualifiers | 23 |
| Finishers | 14 |
| Championship Debutants | Giorgio Bassi (Driver) |
| Milestones | Car 32 - 75th Race Entry (Car Number)
Car 42 - 50th Race Entry (Car Number)
Goodyear - 25th Race Entry (Tyre Manufacturer)
Jackie Stewart - 1st Win (Driver)
Lotus - 25th Fastest Lap (Car Manufacturer)
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| Records Broken |
1. Most Consecutive 2nd Place Finishes – BRM (6),
2. Most 7th Place Finishes in a Season – Jo Bonnier (4)
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| Records Extended |
1. Most Constructors' Championship Points Scores – Cooper, Ferrari (97),
2. Most Drivers' Championship Points Scores – Ferrari (230),
3. Most Constructors' Championship Points Scores – Bruce McLaren (35),
4. Most 4th Place Finishes – Ferrari (37),
5. Most 7th Place Finishes – Jo Bonnier (12),
6. Most 8th Place Finishes – Cooper (24),
7. Most 10th Place Finishes – Lotus (17),
8. Most Races Led – Ferrari (100),
9. Most Laps Led – Ferrari (2529),
10. Most Laps Led – Jim Clark (1442),
11. Most Race Entries – Ferrari (467),
12. Most 2nd Place Qualifications – Ferrari (43),
13. Most 5th Place Qualifications – Ferrari (44),
14. Most 11th Place Qualifications – Cooper (23)
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