Poirier is a French surname, meaning pear tree (cf. poire).
Those bearing this surname include:
Anne and Patrick Poirier, French artistsDustin Poirier, an Acadian-American professional mixed martial arts fighterClaude Poirier, a French-Canadian television journalistDenise Poirier, an American voice actressDenise Poirier-Rivard, a French-Canadian politician from QuebecEdgar (Eddy) Poirier, an Acadian musicianGhislain Poirier, a French-Canadian DJ and record producerGregory Poirier, an American film and television writer, director, and producerJean Poirier, a Canadian politician from OntarioKim Poirier, a French-Canadian actress, singer, film producer, and television hostLuc Poirier, a French-Canadian professional wrestler known as RamboLyne Poirier, a French-Canadian Olympic judokaManuel Poirier, a French film directorMark Poirier, an American novelist and screenwriterNarcisse Poirier, a French-Canadian artistNormand Poirier, an American writer of French-Canadian descentPascal Poirier, a French-Canadian author, lawyer, and politician from New BrunswickPaul Poirier, a Canadian ice dancerRichard Poirier, an American literary criticRose-May Poirier, a French-Canadian politician from New Brunswick