Lallemant is a French surname that may originate in the phrase "l’Allemand", meaning "the German." Variants of the name include: Laleman, Lalemand, Lalemant, Lalleman, L'allemand, and Lallemand. It may refer to:

• Charles Lallemant (1587–1674), first superior of the Jesuit missions in Canada
• Louis Lallemant (1588–1635), French Jesuit
• Jérôme Lalemant (1593–1673), Jesuit priest who came to Canada in 1638
• Gabriel Lallemant (1610–1649), Jesuit missionary, one of the eight Canadian Martyrs, a patron saint of Canada
• Jacques-Philippe Lallemant (1660–1748), French Jesuit
• François Antoine "Charles" Lallemand (1774–1839), French general who served under Napoleon
• Raymond Lallemant (1919-2008), Belgian fighter pilot
• J. Lallemant (1982-), Colombian writer, archivist and poet
• Roza Lallemand (1961–2008), French chess player
• Saúl Lallemand (1977-), Colombian accordion player

• Philippe Lallemand (1636–1716), French portrait painter
• Fritz L’Allemand (1812-1866), Austrian historical painter, whose most well known picture may be "Court banquet in the gardens of Schőnbrunn Palace on the centenary of the Militär-Maria-Theresia-Ordens" (1857).
• Theo Lalleman (1946-2013), Dutch artist and writer

• Lalemant, Quebec, Canada
• Saint-Gabriel-Lalemant, Quebec, Canada

• Talbot, Lester Raymond (1912). Le Français et sa patrie: for elementary reading in schools and... Original from Harvard University: Benj. H. Sanborn & Co. p. 203.