The 2004 Historic Grand Prix of Monaco was the fourth running of the Historic Grand Prix of Monaco, a motor racing event for heritage Grand Prix, Voiturettes, Formula One, Formula Two and Sports cars.
The event featured former Formula One drivers Phil Hill, Stirling Moss and Roberto Mieres.
Festivities included the official opening of a new pit complex.
In Race B, Philip Walker started from the back of the grid due to mechanical issues in practice. He put on a strong recovery drive to finish sixth.