Hooker may be:

• A prostitute
• Galway Hooker, a traditional sailing vessel from the west coast of Ireland
• Hooker (rugby), a position in rugby union or rugby league
• Hooker Glacier, a glacier close to the slopes of Mount Cook in the Southern Alps of New Zealand
• An expert practitioner of catch wrestling who has an expanded knowledge of joint locks and muscle holds and can end a fight in seconds if needed to.
• Title of Lou Thesz's book on Professional Wrestling
• The former name of rock band Aerosmith
• The 100 inch Hooker Telescope at Mount Wilson Observatory
• The cheesy 80's crime drama T.J. Hooker

Hooker is the surname of:

• Evelyn Hooker, Dr. (1907–1996), American psychologist who showed in the 1950s that gay people cannot be distinguished from straight ones by their mental state or capacity
• Joseph Dalton Hooker (1817–1911), English botanist (son of William Jackson Hooker)
• Joseph Hooker (1814–1879), American Civil War General
• John Lee Hooker (1917–2001), American blues singer and guitarist
• Reginald Hawthorn Hooker, English statistician (son of Joseph Dalton Hooker)
• Richard Hooker (1554–1600), Anglican theologian
• Richard Hooker, pseudonym of H. Richard Hornberger (1924–1997), Author of M*A*S*H
• Stanley George Hooker (1907–1984), English aero-engine designer
• Thomas Hooker (1586–1647), a Puritan leader
• William Jackson Hooker (1785–1865), English botanist