3 February 1980 - Daytona 24 Hours - World Championship for Makes

Reinhold Joest, Rolf Stommelen & Volkert Merl win in a Porsche 935J

16 March 1980 - Brands Hatch 6 Hours - World Championship for Makes

Highest place Porsche was the Porsche 935 K3 driven by John Cooper, Pete Lovett & Dudley Wood, which finished 5th

22 March 1980 - Sebring 12 Hours - World Challenge for Endurance Drivers

John Fitzpatrick & Dick Barbour win in a Porsche 935 K3

23 March 1980 - DRM Zolder Bergischer Löwe - DRM - Deutsche Rennsport Meisterschaft

Rolf Stommelen wins in a Porsche 935 J

13 April 1980 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association

Bill Whittington wins in a Porsche 935 K3

27 April 1980 - Riverside 5 Hours - World Challenge for Endurance Drivers

John Fitzpatrick & Dick Barbour win in a Porsche 935 K3

4 May 1980 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association

John Fitzpatrick wins in a Porsche 935 K3

11 May 1980 - Silverstone 6 Hours - World Championship for Makes

Siegfried Brunn & Jürgen Barth second in a Porsche 908/03, 18s behind the winning De Cadenet Lola LM driven by Alain De Cadenet and Desiré Wilson

25 May 1980 - Nürburgring 1000 km - World Championship for Makes

Rolf Stommelen & Jürgen Barth win in a Porsche 908/03

26 May 1980 - Lime Rock 1.5 Hours - IMSA - International Motor Sport Association

John Paul Sr. & John Paul, Jr. win in a Porsche 935 K3

1 June 1980 - DRM Spa - DRM - Deutsche Rennsport Meisterschaft

Axel Plankenhorn 2nd in a Porsche 935 K3/80, 13.57s behind the winning Ford Capri Turbo driven by Klaus Ludwig

15 June 1980 - Le Mans 24 Hours - World Championship for Makes

Jacky Ickx & Reinhold Joest second in Porsche 908/80 Turbo, 2 laps behind the winning Rondeau M379B driven by Jean Rondeau & Jean-Pierre Jaussaud

5 July 1980 - Watkins Glen 6 Hours - World Championship for Makes

John Fitzpatrick & Brian Redman 3rd in Porsche 935 K3/80, 5 laps behind the winning Lancia Beta Montecarlo Turbo driven by Ricardo Patrese & Hans Heyer

20 July 1980 - Interserie Zeltweg - Interserie

Volkert Merl wins in a Porsche 908/03 Turbo

27 July 1980 - Sears Point 100 Miles - IMSA - International Motor Sport Association

John Fitzpatrick wins in a Porsche 935 K3/80

3 August 1980 - Portland 100 Miles - IMSA - International Motor Sport Association

John Fitzpatrick wins in a Porsche 935 K3/80

17 August 1980 - Mosport 6 Hours - World Championship for Makes

John Fitzpatrick & Brian Redman win in a Porsche 935 K3/80

24 August 1980 - DRM Zolder Westfalen-Pokal - DRM - Deutsche Rennsport Meisterschaft

John Fitzpatrick wins in a Porsche 935 K3/80

31 August 1980 - Interserie Most - Interserie

Reinhold Jöst wins in a Porsche 908/80 Turbo

31 August 1980 - Road America 500 Miles - IMSA - International Motor Sport Association

John Paul, Jr. & John Paul Sr. win in a Porsche 935 JLP-2

7 September 1980 - Vallelunga 6 Hours - World Championship for Makes

Siegfried Brunn & Derek Bell second overall and S+2.0 class win in a Porsche 908/03

21 September 1980 - Road Atlanta 50 Miles - Heat 1 - IMSA - International Motor Sport Association

John Fitzpatrick wins in a Porsche 935 K3/80

21 September 1980 - Road Atlanta 50 Miles - Heat 2 - IMSA - International Motor Sport Association

Gianpierro Moretti wins in a Porsche 935 J

28 September 1980 - Dijon 1000 Kilometres - World Championship for Makes

Henri Pescarolo & Jürgen Barth win in a Porsche 935/77A

5 October 1980 - Interserie Kassel-Calden - Interserie

Volkert Merl wins in a Porsche 908/03 Turbo

12 October 1980 - H. P.-Joisten-Trophy Zolder - Non Championship Race

Dieter Schornstein wins in a Porsche 935/77A

30 November 1980 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association

Gianpiero Moretti & Reinhold Joest win in a Porsche 935 J