The 1970 United States Grand Prix was a Formula One motor race held on October 4, 1970 at the Watkins Glen Grand Prix Race Course in Watkins Glen, New York. It was race 12 of 13 in 1970 Formula One season.

The race was won by Emerson Fittipaldi, driving a Lotus-Ford, after he started from third position. Fittipaldi achieved his first Formula One victory, and the first for a Brazilian driver, in only his fourth Grand Prix start. Mexican driver Pedro Rodríguez finished second in a BRM, having led before a late pit stop for fuel, while Fittipaldi's Swedish team-mate Reine Wisell, making his F1 debut, finished third, which would turn out to be his only podium finish.

Belgian driver Jacky Ickx finished fourth in his Ferrari, having started from pole position before pitting to repair a broken fuel line. This result meant that Jochen Rindt became the first and, to date, only posthumous Formula One World Champion.