The 2003 Monaco Grand Prix was a Formula One motor race that took place on 1 June 2003 at the Circuit de Monaco in Monte Carlo. It was the seventh round of the 2003 Formula One World Championship.

Ralf Schumacher of BMW Williams took pole position for the race, but his teammate Juan Pablo Montoya won the race ahead of championship leader Kimi Räikkönen of McLaren and current World Champion Michael Schumacher of Ferrari. It was Williams's first victory in Monaco since Keke Rosberg in 1983.

There were no recorded on-track overtakes during this race, one of the very few occasions in Formula One history where this has occurred. The other three races since 1981 not to feature any on-track overtakes were the controversial 2005 United States and 2021 Belgian Grands Prix, as well as the 2009 European Grand Prix.