The 1973 Phillip Island 500K was an endurance race for Group C Touring Cars, staged at the Phillip Island circuit in Victoria, Australia on 25 November 1973. Race distance was 106 laps of the 4.73 km circuit, a total distance of 501.38 km. The race, which was the fifth and final round of the 1973 Australian Manufacturers' Championship, was the third Phillip Island 500K.