| Date | Sunday 3 October 1965 |
| Start time | 14:00 |
| Event | United States GP |
| Circuit | Watkins Glen |
| Event Format | Race of 110 laps |
| Championship | World Championship |
| Race number | #9 of 10 in 1965 #140 (of all time) |
| Laps | 110 |
| Circuit Perimeter | 3701 m |
| Race Distance | 3701 × 110 = 407.110 km |
| Grid Format | 2-2-2-2 |
| Pole Position | Right |
| First Corner | Right |
| Track Direction | Clockwise |
| Weather | Overcast, Showers |
| Entries | 18 |
| Qualifiers | 18 |
| Finishers | 13 |
| Debutants | Bob Bondurant (Driver) |
| Milestones | Car 15 – 50th Race Entry (Car Number)
R.R.C. Walker Racing Team – 100th Race Entry (Entrant)
Innes Ireland – 50th Race Entry (Driver)
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| Records Broken |
1. Most Constructors' Championship Points Scores – Ferrari (99),
2. Most 9th Place Qualifications – Bruce McLaren (10),
3. Most 9th Place Qualifications in a Season – Bruce McLaren (4),
4. Most 10th Place Qualifications in a Season – Brabham (6)
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| Records Extended |
1. Most Drivers' Championship Points Scores – Ferrari (232),
2. Most 4th Place Finishes – Ferrari (38),
3. Most 5th Place Finishes – Ferrari (26),
4. Most 10th Place Finishes – Lotus (18),
5. Most Laps Led – Jim Clark (1445),
6. Most Race Entries – Ferrari (470),
7. Most 5th Place Qualifications – Ferrari (45),
8. Most 9th Place Qualifications – Cooper (25)
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