Guillaumin is a French surname. Notable people with the surname include:
André Guillaumin (1885–1974), French botanist Armand Guillaumin (1842–1927), French impressionist painter and lithographer Claude Guillaumin (1842–1927), French painter and caricaturist Colette Guillaumin (1934–2017), French sociologist Gilbert-Urbain Guillaumin (1801–1864), French publisher