|Date 11 August 1991||Course length 3.968 km (2.466 mi)|
|Official name VII Marlboro Magyar Nagydíj|
Location Hungaroring, Budapest, Hungary
Course Permanent racing facility
Distance 77 laps, 305.536 km (189.850 mi)
The 1991 Hungarian Grand Prix was a Formula One motor race held at Hungaroring on 11 August 1991. It was the tenth round of the 1991 Formula One season.
Nigel Mansell and Williams were on a roll as Formula One arrived in Hungary, while Ayrton Senna and Alain Prost were ordered by FISA to work out their differences following their confrontation in the German Grand Prix. Senna was also angry with his McLaren team after he had run out of fuel in the two previous races, losing valuable points to Mansell. Senna proceeded to dominate qualifying, taking pole by over a second from Riccardo Patrese, Mansell, Prost, Gerhard Berger, Jean Alesi, Emanuele Pirro, Stefano Modena, Ivan Capelli, and Martin Brundle.
At the start, Senna and Patrese both got away well, but Senna managed to keep the lead, with Mansell, Prost, Berger, and Alesi rounding out the top six. Mansell followed and hounded his teammate, but Senna was unable to pull out a significant gap. Meanwhile, Prost's day ended early with an engine failure, just adding to the misery that was the 1991 season for the three time champion. Mansell eventually got past Patrese and set off after Senna, but on a track that is not conducive to passing, he had to settle for second. Senna duly won from Mansell, Patrese, Berger, Alesi, and Capelli. Senna now led the world championship by 12 points as the teams packed up and headed to Belgium.