The 1986 Brazilian Grand Prix was a Formula One motor race held at Jacarepaguá in Rio de Janeiro on 23 March 1986.

The race was won by local driver Nelson Piquet, driving a Williams-Honda, after he started from second position.

Compatriot Ayrton Senna took pole position in his Lotus-Renault, but Piquet overtook him on lap 3 and went on to win from him by 34 seconds.

Senna used his influence at Lotus to ensure they hired a driver that would not interfere with his campaign which left Derek Warwick out of a seat, although that would prove to be temporary.

Philippe Streiff in the second Tyrrell, Elio de Angelis (Brabham BT55), Johnny Dumfries (Lotus 98T) and Teo Fabi (Benetton B186) were the only other finishers in a day of high attrition where Mansell had been the only non-mechanical retirement.