The Ligier JS23 was a Formula One car designed by Michel Beaujon and Claude Galopin for the Ligier team for use in the 1984 Formula One season. The car was powered by a turbocharged Renault V6 engine and ran on Michelin tyres. Drivers of the car during 1984 were François Hesnault and Andrea de Cesaris.

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Ligier JS23
Ligier JS23B

Andrea de Cesaris driving the JS23 at the 1984 Dallas Grand Prix
Category	Formula One
Constructor	Ligier
Designer(s)	Michel Beaujon (Technical Director) Claude Galopin (Chief Designer) Henri Durand (Head of Aerodynamics)
Predecessor	JS21
Successor	JS25
Technical specifications[1]
Chassis	Carbon fibre Monocoque
Suspension (front)	Double wishbones, pushrods
Suspension (rear)	Double wishbones, pushrods
Axle track	Front: 1,800 mm (71 in) Rear: 1,652 mm (65.0 in)
Wheelbase	2,810 mm (111 in)
Engine	Renault Gordini EF4, 1,492 cc (91.0 cu in), 90° V6, turbo, mid-engine, longitudinally mounted
Transmission	Ligier / Hewland 5-speed manual
Weight	540 kg (1,190 lb)
Fuel	Elf
Tyres	Michelin
Competition history
Notable entrants	Ligier Loto
Notable drivers	25. François Hesnault 26. Andrea de Cesaris
Debut	1984 Brazilian Grand Prix
Last event	1984 Portuguese Grand Prix
Races Wins Poles F/Laps 16 0 0 0
Constructors' Championships	0
Drivers' Championships	0

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1984 wasn't a successful year for Ligier with de Cesaris scoring all three points Ligier earned meaning the French team finished 9th in the Constructors Championship. De Cesaris actually scored the three points with a 5th place at the 2nd race of the season in South Africa and a 6th place two races later in San Marino.

The JS23 was replaced for the 1985 season by the Ligier JS25.

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