Lack is a surname. Notable people with the surname include:
Andrew Lack (author) (born 1953), English biologist and author Andrew Lack (executive) (born 1947), chairman of NBC News and MSNBC David Lack (1910–1973), British ornithologist and biologist Eddie Lack (born 1988), Calgary Flames goaltender Fredell Lack (1922–2017), American classical violinist James J. Lack (born 1944), New York politician and judge Ken Lack (1934–2001), Jamaican record producer Mercie Lack (1894-1985), British photographer Portia Lack (born 1961), American handball player Saskja Lack (born 2000), Swiss freestyle skier Simon Lack (1913–1980), Scottish actor Stephen Lack (born 1946), Scottish painter and actor Théodore Lack (1846–1921), French classical pianist and composer