Crook is an Old Norse surname. Notable people with the surname include:

• A. R. Crook (1864–1930), American geologist
• Al Crook (Alfred John Crook; 1897–1958), American football player
• Alan Crook (1897–1965), Australian electrical engineer
• Andrew Crook (born 1980), Australian cricketer
• Anna Crook (born 1934), American politician, member of the New Mexico House of Representatives (1995–2015)
• Billy Crook (disambiguation)
• Carl Crook (born 1963), English amateur lightweight and professional light/light welterweight boxer
• Catherine Crook de Camp (1907–2000), American science fiction author
• Charles Crook (1862–1926), English teacher, trade union official and politician, Member of Parliament (1922–1923, 1924–1926)
• Clive Crook (born 1953), English columnist, editor and author
• Eddie Crook Jr. (1929–2005), American boxer
• David Crook (1910–2000), British Marxist
• David Moore Crook (1914–1944), British fighter pilot
• Elizabeth Crook (born 1959), American novelist
• Frances Crook (born 1952), British Labour Party politician
• General Crook or General Columbus Crook (born 1945), an American blues musician
• Geoffrey Crook (born 1978), English cricketer
• George Crook (1828–1890), American general
• George Crook (rugby union) (born 1988), English rugby union player
• Gordon Crook (1921–2011), New Zealand visual artist
• Hal Crook (born 1950), jazz trombonist
• Helen Crook (born 1971), British tennis player
• Henry Crook (1802–1886), English first-class cricketer
• Herbert Crook (born 1965), American basketball player
• Howard Crook (born 1947), American tenor
• Ian Crook (born 1963), former English professional football player
• Isabel Crook (1915–2023), Canadian-British anthropologist, political prisoner and professor
• J. Mordaunt Crook (born 1937), British architectural historian
• Jack Crook (born 1993), English basketball player
• Jeff Crook, American novelist
• John Crook (disambiguation), multiple people
• Joseph Crook (1809–1884), Liberal British Member of Parliament (1852–1861)
• Kenneth Crook (1920–2012), British politician and diplomat, Governor of the Cayman Islands (1971–1974), Ambassador to Afghanistan (1976–1979)
• Lorianne Crook (born 1957), American radio and television personality
• Lupen Crook (Matthew Pritchard), English musician and songwriter
• Mackenzie Crook (born 1971), British actor
• Malcolm Crook, professor of French history
• Margaret Brackenbury Crook (1886–1972), British Unitarian minister and U.S. professor of religious studies
• Martyn Crook (1956–2008), British soccer coach
• Maryrose Crook, musician and artist from New Zealand
• Max Crook (1936–2020), American musician
• Narciso Crook (born 1995), Dominican baseball player
• P. J. Crook (born 1945), British painter
• Paul Crook (born 1966), American guitarist
• Paul Crook (rugby league, born 1974)
• Paul Crook (rugby league, born 1986)
• Peter Crook (businessman) (born 1963), chief executive of Provident Financial (until 2017)
• Peter Crook (skier) (born 1993), British Virgin Islander Olympic freestyle skier
• Reginald Crook, 1st Baron Crook (1901–1989), British peer
• Robert Crook (disambiguation)
• Steven Crook (born 1983), Australian cricketer
• Terry Crook (born 1947), English rugby league footballer of the 1960s, 1970s and 1980s
• Thomas Crook (1798–1879), New York politician
• Thurman C. Crook (1891–1981), U.S. politician
• T. Mewburn Crook (1869-1949), English sculptor
• Tommy Crook (born 1944), American musician
• Tony Crook (disambiguation)
• Walter Crook (1912–1988), English footballer and manager
• William Crook (disambiguation)

• Crooks (surname)