Cachin is a surname. Notable people with the surname include:
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Christian Cachin, Swiss cryptographer
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Françoise Cachin (1936–2011), French art historian
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Joseph Cachin (1757–1825), French engineer
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Pedro Cachín
Pedro Cachín (; born 12 April 1995 in Bell Ville) is an Argentine professional tennis player. Cachín has a career high ATP singles ranking of world No. 54 achieved on 14 November 2022. He also has a career high ATP doubles ranking of world No. ...
(born 1995), Argentine tennis player
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Marcel Cachin
Marcel Cachin (20 September 1869 – 12 February 1958) was a French Communist politician and editor of the daily newspaper ''L'Humanite''.
In 1891, Cachin joined Jules Guesde's French Workers' Party (POF). In 1905, he joined the new French ...
(1869–1958), French politician
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