1975 World Sportscar Championship
The 1975 World Sportscar Championship season was the 23rd season of FIA World Sportscar Championship motor racing. It featured the 1975 World Championship for Makes which was open to Group 5 Sports Cars and Group 4 Special GT Cars. It also included the FIA Cup for GT Cars and the FIA Cup for 2-Litre Cars. The three titles were contested concurrently over a nine race series which ran from 1 February to 12 July 1975.
Schedule
| Rnd | Race | Circuit or Location | Date |
| 1 |  24 Hours of Daytona† | Daytona International Speedway | 1 February 2 February |
| 2 |  1000 km of Mugello | Mugello Circuit | 23 March |
| 3 |  800 km of Dijon | Dijon-Prenois | 6 April |
| 4 | Trofeo Filippo Caracciolo | Autodromo Nazionale Monza | 20 April |
| 5 |  1000km Spa | Circuit de Spa-Francorchamps | 4 May |
| 6 | Coppa Florio | Autodromo di Pergusa | 18 May |
| 7 |  1000km Nürburgring | Nürburgring | 1 June |
| 8 |  1000km Zeltweg | Österreichring | 29 June |
| 9 | Watkins Glen 6 Hours | Watkins Glen International | 12 July |
† Due to a lack of Group 5 entries, the FIA initially rescinded the championship status of the Daytona race. Several months after the event the FIA retroactively conferred championship status to the race and placed cars into the classes they would theoretically have entered.
Season results
Races
| Rnd | Circuit | Winning Team | GT Winning Team | 2-Litre Winning Team | Results |
| Rnd | Circuit | Winning Drivers | GT Winning Drivers | 2-Litre Winning Drivers | Results |
| 1 | Daytona | #59 Brumos Porsche | #71 North American Racing Team | None | Results |
| 1 | Daytona | Hurley Haywood Peter Gregg | Jon Woodner Fred Phillips | Results | |
| 2 | Mugello | #5 Elf Alpine-Renault | #44 Gelo Racing Team | #24 KVG Racing | Results |
| 2 | Mugello | Jean-Pierre Jabouille Gérard Larrousse |  John Fitzpatrick Toine Hezemans Manfred Schurti | John Hine Ian Grob | Results |
| 3 | Dijon-Prenois | #2 Willi Kauhsen Racing Team | #33 Gelo Racing Team | #18 KVG Racing | Results |
| 3 | Dijon-Prenois | Arturo Merzario Jacques Laffite | John Fitzpatrick Toine Hezemans | Ian Grob John Hine | Results |
| 4 | Monza | #2 Willi Kauhsen Racing Team | None |  #15 Eqipe Elf Switzerland | Results |
| 4 | Monza | Arturo Merzario Jacques Laffite | Lella Lombardi Marie-Claude Beaumont | Results | |
| 5 | Spa-Francorchamps | #2 Willi Kauhsen Racing Team |  #42 Porsche Club Romand | #34 Peter Smith | Results |
| 5 | Spa-Francorchamps | Henri Pescarolo Derek Bell | Claude Haldi Bernard Béguin | Peter Smith John Turner | Results |
| 6 | Pergusa | #1 Willi Kauhsen Racing Team | #48 Tebernum Porsche Racing | #27 Scuderia Citta dei Mille | Results |
| 6 | Pergusa | Arturo Merzario Jochen Mass | Hartwig Bertrams Clemens Schickentanz Reine Wisell | Giancarlo Gagliardi "Bramen" | Results |
| 7 | Nürburgring | #1 Willi Kauhsen Racing Team | #54 Jägermeister Kremer Racing | #30 March-Hart Racing | Results |
| 7 | Nürburgring | Arturo Merzario Jacques Laffite | Helmut Kelleners Hans Heyer Bob Wollek | David Morgan John Lepp  Vern Schuppan | Results |
| 8 | Österreichring | #2 Willi Kauhsen Racing Team | None | #29 March Racing | Results |
| 8 | Österreichring | Henri Pescarolo Derek Bell | David Morgan John Lepp | Results | |
| 9 | Watkins Glen | #4 Willi Kauhsen Racing Team | #95 Bob Hagestad Porsche-Audi | None | Results |
| 9 | Watkins Glen | Henri Pescarolo Derek Bell | Bob Hagestad Hurley Haywood | Results |
World Championship for Makes
Points towards the World Championship for Makes were awarded to the top 10 positions in each race in the order of 20-15-12-10-8-6-4-3-2-1. Points were awarded to the position gained by the highest placed car from each make with any positions filled by other cars from the same make not attracting points. No points were awarded to positions gained by cars other than Group 5 Sports Cars and Group 4 Special GT Cars.Only the 7 best results were retained for championship classification. Discarded points are shown within brackets
| Pos. | Make | Rd 1 | Rd 2 | Rd 3 | Rd 4 | Rd 5 | Rd 6 | Rd 7 | Rd 8 | Rd 9 | Total |
| 1 | Alfa Romeo | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 140 | ||
| 2 | Porsche | 20 | 12 | 15 | 15 | 12 | 12 | 12 | 98 | ||
| 3 | Alpine-Renault | 20 | 12 | 10 | 12 | 54 | |||||
| 4 | Chevron | 8 | 12 | 3 | 2 | 6 | 1 | 4 | 36 | ||
| 5 | Mirage | 15 | 15 | ||||||||
| 6 | March | 4 | 8 | 12 | |||||||
| 7 | Ligier | 4 | 6 | 10 | |||||||
| Lola | 1 | 3 | 6 | 10 | |||||||
| 9 | Ferrari | 4 | 4 | ||||||||
| 10 | Chevrolet | 3 | 3 |
FIA Cup for GT Cars
| Pos. | Make | Rd 1 | Rd 2 | Rd 3 | Rd 4 | Rd 5 | Rd 6 | Rd 7 | Rd 8 | Rd 9 | Total |
| 1 | Porsche | 15 | 20 | 20 | 20 | 20 | 20 | 20 | 135 | ||
| 2 | Ferrari | 20 | 20 | ||||||||
| 3 | Chevrolet | 8 | 10 | 18 | |||||||
| 4 | De Tomaso | 8 | 8 | ||||||||
| 5 |  Datsun | 3 | 3 |