Flandin is a French surname. Notable people with the surname include:
Eugène Flandin (1809–1889), French painter Hervé Flandin (born 1965), French biathlete Pierre-Étienne Flandin (1889–1959), French politician
See also Louis A. Bertrand (1808–1875), leader of the Church of Jesus Christ of Latter-day Saints, was born John Francis Elias Flandin