The 1975 Italian Grand Prix was a Formula One motor race held at Monza on 7 September 1975. It was race 13 of 14 in both the 1975 World Championship of Drivers and the 1975 International Cup for Formula One Manufacturers. It was the 45th Italian Grand Prix and the 41st to be held at Monza. The race held over 52 laps of the five kilometre circuit for a race distance of 300 kilometres.

The Italian Grand Prix is the fifth oldest national motor racing Grand Prix, having been held since 1921. Since 2013, it has been the Grand Prix held the most times, with 93 editions as of 2023. It is one of the two Grands Prix which has run as an event of the Formula One World Championship Grands Prix every season, continuously since the championship was introduced in 1950. Every Formula One Italian Grand Prix in the World Championship era has been held at Monza except in 1980, when it was held at Imola.