The 1981 World Sportscar Championship season was the 29th season of FIA World Sportscar Championship motor racing. It featured the 1981 FIA World Endurance Championship which was contested over a fifteen race series which ran from 31 January to 27 September. The former World Challenge for Endurance Drivers was renamed to the World Endurance Championship of Drivers for 1981 and the World Championship of Makes was renamed to the World Endurance Championship of Makes. Bob Garretson won the World Endurance Championship of Drivers and Lancia was awarded the World Endurance Championship of Makes.
World Endurance Championship of Drivers was contested over all fifteen races however only six of the races counted towards the World Endurance Championship of Makes.
Although various classes of cars contested the championship races, only the overall race winners are listed in the table below.
The World Endurance Championship of Drivers was open to FIA Group 1, Group 2, Group 3, Group 4, Group 5, Group 6, Group C and GTP cars and to IMSA GTX, IMSA GTP, IMSA AAGT, IMSA GTO, IMSA GTU and IMSA RS cars.
Drivers Championship points were awarded on a 20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1 basis to the first twenty overall finishers at each round. Bonus points were also awarded as follows:
Only half points were awarded at the shortened Nurbugring round. All points scored were retained towards the championship totals.
A total of 371 drivers scored points in the 1981 World Endurance Championship of Drivers.
The World Endurance Championship of Makes was open FIA Group 1, Group 2, Group 3, Group 4 and Group 5 cars and to IMSA GTX cars.