Qualifying was extremely wet and so it was Friday morning times that really counted for the grid - for Mario Andretti this was particularly unfortunate as his car was stranded out on the track at this time and so he was unable to qualify despite lying second in the World Championship. Jackie Stewart claimed a stunning pole position over a second ahead of his front row companion Jacky Ickx and shot into an immediate lead from the fast-starting Jo Siffert, Ickx, Pedro Rodríguez, Ronnie Peterson and Denny Hulme. Chris Amon stalled on the grid and Graham Hill - seeking a 6th Monaco win - made a rare mistake, hitting the wall at Tabac on the 2nd lap.
Stewart extended his lead from Siffert and Ickx, despite being painfully ill from fumes leaking into the cockpit. Peterson was astonishing the crowd with his valiant attempts to take 4th place from Rodríguez, who was baulking him as much as was legally possible. Hulme actually managed to join the battle and pass Peterson on one lap. Eventually the Mexican slipped up under pressure and locked up a wheel to let both Peterson and Hulme through.
The Who used parts of the Grand Prix and showed Jackie Stewart in the music video for the song "Baba O'Riley".