Leman is a surname. Notable people with the surname include:
- Albert Leman (1915–1998), Russian composer
- Ben Leman, member of Texas House of Representatives from district 13
- Bob Leman (1922–2006), American science fiction and horror author
- Dennis Leman, English footballer
- Gérard Leman (1851–1920), Belgian general
- Jeremy Leman (born 1985), known as J. Leman, American football linebacker
- John Leman (died 1632), English tradesman
- Jules Leman (1826–1880), French priest and schoolmaster
- Kevin Leman, American psychologist and author
- Loren Leman (born 1950), American politician
- Martin Leman (born 1934), British artist
- Richard Leman (born 1959), English field hockey player
- Robert Leman, (1799-1869), English artist
- Ulrich Leman (1885–1988), German painter