The 73ème Rallye Automobile de Monte-Carlo, the first round of the 2005 World Rally Championship season took place between January 21 and 23, 2005.

The Monte Carlo Rally or Rallye Monte-Carlo is a rallying event organized each year by the Automobile Club de Monaco. From its inception in 1911 by Prince Albert I, the rally was intended to demonstrate improvements and innovations in automobiles, and promote Monaco as a tourist resort on the Mediterranean shore. Before the format changed in 1997, the event was a “concentration rally” in which competitors would set off from various starting points around Europe and drive to Monaco, where the rally would continue to a set of special stages. The rally now takes place along the French Riviera in Monaco and southeast France.