Citroën ([sitʁoˈɛn]) is a French automobile manufacturer. Founded in 1919 by André Citroën, it was the one of the world's first mass-production car company outside of the USA.^{[citation needed]} Since 1976 it has been part of PSA Peugeot Citroën, and its headquarters is on rue Fructidor,^{[citation needed]} in Saint-Ouen, Seine-Saint-Denis, near Paris. The brand celebrated its 90th Anniversary in 2009.

Originally a mass-market car maker with relatively straightforward designs, Citroën shocked the world in 1934 with the innovative Traction Avant, the world's first mass-production front wheel drive car (1934–57). Other significant models include the H Van (1947–81), the 2CV (1948–90), the DS (1955–1975) and the CX (1974–91).