15 TIMES, and thats more then Ferrari, Red Bull and Williams
They have won it 15 times, their first being in 1984 with Prost and their most recent being in 2008 with Hamilton.
Bruce McLaren Cooper-Climax
Alain Prost McLaren-TAG
Alain Prost McLaren-TAG
Alain Prost McLaren-Honda
Ayrton Senna McLaren-Honda
Ayrton Senna McLaren-Ford
David Coulthar McLaren-Mercedes
Fernando Alonso--McLaren-Mercedes
Ayrton Senna McLaren-Honda
Mika Häkkinen McLaren-Mercedes
The British Grand Prix. However, they have actually won the Monaco GP even more times - 15. Ferrari hold the record for the most wins at the same GP - 20 at the German GP