1983 World Sportscar Championship season

The 1983 World Endurance Championship season was the 31st FIA World Sportscar Championship season. It was a series running under the Group C and Group B formulas, running cars in three classes known as C, C Junior, and B. It ran from 10 April 1983 to 10 December 1983, and was composed of seven races.

In conjunction with the World Championship, a European Endurance Championship was also held, combining World Championship events with other European endurance events. A drivers title for the European Endurance Championship was awarded alongside World Endurance Championship. The European Championship ran from 10 April 1983 to 23 October 1983, and was composed of eight races.

Schedule
Races which were part of the World Endurance Championship or European Endurance Championship are marked accordingly.

Manufacturers Championships
Points were awarded to the top 10 finishers in the order of 20-15-12-10-8-6-4-3-2-1, with the following exceptions:
 * Manufacturers were only given points for their highest finishing car; any other cars from that manufacturer were merely skipped in the points standings. Points were still awarded to their drivers however.
 * Manufacturer did not score points if they did not complete 90% of the winner's distance.

All cars were awarded points for the overall championship, but C2 and B class cars were scored separately for their own championship. Only the best 5 points finishes counted towards the championship, with any other points earned not included in the total. Skipped points are marked in parenthesis.

European Endurance Championship rounds did not count towards the Manufacturers Championships and are thus not listed. Chassis builder and engine builder were considered as a single constructor, thus multiple chassis or engines can be listed.