Back Ligier JS9 French Ligier JS9 Italian リジェ・JS9 Japanese Ligier JS9 Polish Ligier JS9 Portuguese Ligier JS9 Russian
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| Category | Formula One | ||||||||
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| Constructor | Ligier | ||||||||
| Designer(s) | Gérard Ducarouge (Technical Director) Michel Beaujon (Chief Designer) Robert Choulet (Head of Aerodynamics) | ||||||||
| Predecessor | JS7 | ||||||||
| Successor | JS11 | ||||||||
| Technical specifications[1] | |||||||||
| Chassis | Aluminium monocoque | ||||||||
| Axle track | Front: 1,625 mm (64.0 in) Rear: 1,515 mm (59.6 in) | ||||||||
| Wheelbase | 2,800 mm (110 in) | ||||||||
| Engine | Matra MS76, 2,993 cc (182.6 cu in), 60° V12, NA, mid-engine, longitudinally mounted | ||||||||
| Transmission | Hewland FGA 400, 6-speed manual | ||||||||
| Weight | 580 kg (1,280 lb) | ||||||||
| Fuel | Shell | ||||||||
| Tyres | Goodyear | ||||||||
| Competition history | |||||||||
| Notable entrants | Ligier Gitanes | ||||||||
| Notable drivers |  Jacques Laffite | ||||||||
| Debut | 1978 Spanish Grand Prix | ||||||||
| Last event | 1978 Canadian Grand Prix | ||||||||
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| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 0 | ||||||||
The Ligier JS9 was a Formula One racing car manufactured and raced by Ligier during the 1978 Formula One season. Driven by Frenchman Jacques Laffite, its best finish was third (twice).