Lemaire (or LeMaire or Le Maire) is a surname. Notable people with the surname include:
Adrien Lemaire (1852–1902), French botanist
Alfred Jean Baptiste Lemaire, French military musician
Axelle Lemaire, (born 1974), French politician
Bernard Lemaire (born 1936), Canadian businessman
Bernard Lemaire (prefect) (1946-2009), French civil servant (prefect)
Bruno Le Maire (born 1969), French Minister of Food, Agriculture and Fishing
Christophe Lemaire (full name Christophe Patrice Lemaire, born 1979), French-born jockey
Charles LeMaire (1897–1985), American costume designer
Charles Lemaire (explorer), Belgian explorer of the Belgian Congo
Charles Antoine Lemaire (1800–1871), French botanist and botanical author
Denise Lemaire (born 1956), former Canadian handball player
Edward LeMaire (died 1961), American figure skater
Géry Lemaire (1928-2013), Belgian orchestra conductor and orthodox priest
Ghislain Lemaire (born 1972), French judoka
Isaac Le Maire (1558–1624), merchant for the Vereenigde Oostindische Compagnie
Jacob Le Maire (1585–1616), Dutch explorer and discoverer of Cape Horn
Jacques Gerard Lemaire (born 1945), former ice hockey centre and former coach of the New Jersey Devils in the National Hockey League
Jean Lemaire de Belges (c. 1473 – c. 1525), Walloon poet and historian who lived primarily in France
Jean-Marie Lemaire (born 1936), Belgian Olympic rower
Madeleine Lemaire (1845–1928), French painter
Maximiliaan le Maire (1606–1654), Dutch officer for the Vereenigde Oostindische Compagnie
Paulin Lemaire (born 1882 - died ?), French gymnast
Philema Lemaire (1856–1932), French politician and a Governor General of Pondicherry in Second French Colonial Empire
Philippe Joseph Henri Lemaire (1798–1880), French sculptor
Tabitha Lemaire (born 1977), French-Canadian singer
Aimée Bologne-Lemaire (1904–1998), Belgian feminist, member of the Resistance, and Walloon activist
Louis François Auguste Cauchois-Lemaire (1789–1861), French journalist
