The Citroën Ami is a supermini produced by the French automaker Citroën from 1961 to 1978. The Ami and stablemate Citroën Dyane were replaced by the Citroën Visa and Citroën Axel (the Axel was never sold in the UK). The Ami was for some years the best-selling car model in France. Production totalled 1,840,396 units.

Although not its commercial name, in France the Ami was often referred to as the Citroën 3CV Trois chevaux, or "three horses", CV originally being the initials for "cheval-vapeur" (horsepower), but used here for "chevaux fiscaux" in short. The "cheval fiscal" was a French fiscal unit based on engine size ; smaller CV usually meant economical cars. The 602 cc engine of the Ami was fractionally above the upper limit for the 2 CV taxation class. The 3CV nickname differentiated the car in the market place from the long established Citroën 2CV, but was never applied to the Ami 8, only to the Ami 6.