The 2001 Italian Grand Prix was a Formula One motor race held on 16 September 2001 at the Autodromo Nazionale di Monza near Monza, Lombardy. It was the 15th round of the 2001 Formula One World Championship. Rookie Williams driver Juan Pablo Montoya won the race from pole position. Rubens Barrichello finished second in a Ferrari with Montoya's teammate Ralf Schumacher third.

Montoya maintained his start-line advantage and led until he exited a chicane slowly due to a tyre blister and was overtaken by Barrichello on the ninth lap. Barrichello pulled away from Montoya and held the lead until his first of two pit stops on lap 19 which proved problematic because of a faulty refuelling rig that had been reprogrammed. Montoya was put a one-stop strategy by his team and made a pit stop on lap 29, which allowed his teammate Ralf Schumacher to lead the race for six laps. Barrichello regained the lead on lap 36, and held it for six more laps until Montoya took over the position on lap 42 when Barrichello made a pit stop for the second time for fuel. Barrichello started to reduce the gap between himself and Montoya but was unable to challenge the Williams driver who achieved his maiden Formula One victory and the first for a Colombian driver.