Backer is a surname. Notable people with the surname include:
Agathe Backer-Grøndahl (1847–1907), Norwegian pianist and composerAugustin de Backer (1809–1873), Roman Catholic bibliographerBrad Backer, Australian rugby league footballerBrian Backer (born 1956), American actorCornelis Andries Backer (1874–1963), Dutch botanistHarriet Backer (1845–1932), Norwegian painterJacob de Backer (c. 1555 – c. 1585), Flemish Mannerist painter and draughtsmanJacob Adriaensz Backer (1609–1651), Dutch painterLars Backer (1892–1930), Norwegian architectP. A. Backer (1940–1993), Malayalam film directors