Cottin is a surname. Notable people with the surname include:
Alfred Cottin (1863–1923), guitarist, composer and author Camille Cottin (born 1978), French actress Cyrille Cottin II (1870–1942), French industrialist and racing driver Émile Cottin (1896–1936), French anarchist and attempted assassin Jacques Cottin, French costume designer Jules Cottin (1868–1922), mandolinist, composer and author Sophie Ristaud Cottin (1770–1807), French writer Letty Cottin Pogrebin (born 1939), American feminist writer and journalist
Other Cottin & Desgouttes, French automobile manufacturer from the beginning of the 20th century