The CX was a model of Citroën automobile manufactured and sold between 1974 and 1988. A total of 1,042,460 CXs were produced. The CX is often cited by enthusiasts as the last 'real' Citroën before Peugeot took control of the company in 1974. The CX was voted European Car of the Year for 1975.

Available models were four-door 'berline' (also known as 'saloon'), 'break' (also known as 'estate', 'station wagon'), and a long-wheelbase version of the 'berline' built on the 'break' chassis. The CX employed Citroën's unique hydropneumatic suspension which delivered a smooth ride.

The design followed the template created by Pininfarina for their BMC 1100 and 1800 prototypes of the mid-1960s.

In the early 1980s the styling was revised. The earlier Series 1 vehicles were characterised by stainless steel front and rear bumpers, and an extraordinary 'spaceship' dashboard featuring revolving drum speedometer and rev-counter. The later Series 2 cars lost some of the earlier quirkiness and were fitted with plastic bumpers and conventional round-dial instrumentation. Both petrol and diesel-powered models were available in various engine sizes including turbo versions. Manual, semi-automatic ('C-Matic') and fully-automatic transmissions were fitted.

Luxury trim-level berlines were badged as 'Pallas'. The long-wheelbase berlines were badged as 'Prestige' (petrol engine) or 'Limousine' (diesel).

The Prestige model was used by the French government including Jacques Chirac. It was replaced by the Citroën XM.