1973 World Sportscar Championship season

The 1973 World Championship for Makes and International Grand Touring Trophy seasons were the 21st season of the FIA World Sportscar Championship. It was a series for Sportscars and Grand Touring. It ran from February 3, 1973 to July 21, 1973, and was composed of ten races.

Schedule
† - Sportscars only, GT class did not participate.

Season results
Points were awarded to the top 10 finishers in the order of 20-15-12-10-8-6-4-3-2-1. Manufacturers were only given points for their highest finishing car; any other cars from that manufacturer were merely skipped in the points standings.

Overall Manufacturers Championship
All cars were awarded points for the overall championship, but the GT class also had their own separate championship.

Cars participating in races that were not included in the S, P, or GT classes are skipped in rewarding points for the overall championship.

Only the best 7 points finishes counted towards the championship, with any other points earned not included in the total. Skipped points are marked in italics.

GT Manufacturers Championship
The GT class did not participate in Round 9. Only the best 6 finishes counted towards the championship.