The Diepholz Airfield Circuit was an auto racing circuit in the south-west of the town of Diepholz, Germany. It was a temporary circuit on a military airfield, which is still in use by the German military today.
The full length of the runway was used as part of the circuit with a fast double chicane and the start/finish straight which included a temporary pit lane going down one side of the runway. There were no pit garages or permanent racing related buildings on site. Racing first took place at Diepholz in 1968, due to a lack of permanent circuits in Germany. Used mainly for Touring car racing, Diepholz was a regular venue on the calendar for the DTM series. When the DTM, then known as the FIA International Touring Car Championship, collapsed at the end of 1996, there was little use for the circuit.
The official race lap records at the Diepholz Airfield Circuit are listed as:
|Full Circuit: 2.720 km (1968–1996)|
|Group C||0:48.150||Hans-Joachim Stuck||Porsche 962C||1987 Diepholz Supercup round|
|Formula 3||0:53.800||Volker Weidler||Martini MK45||1985 Diepholz German F3 round|
|Class 1 Touring Cars||0:57.735||Alexander Wurz||Opel Calibra V6 4x4||1996 ITC Diepholz round|
|Group A||0:59.190||Manuel Reuter||Ford Sierra RS500 Cosworth||1987 Diepholz DTM round|
- "Supercup Diepholz 1987". Retrieved 21 May 2022.
- "18. ADAC Flugplatzrennen Diepholz 10.Lauf Deutsche Rennwagen-Meisterschaft F3 Ergebnis Rennen" (PDF). Retrieved 21 May 2022.
- "ITC 1996 » Diepholz Round 12 Results". Retrieved 21 May 2022.
- "Deutsche Tourenwagen Meisterschaft 1987 » Diepholz Round 9 Results". Retrieved 21 May 2022.