Horner is an English and German surname that derives from the traditional occupation horner, meaning horn-worker or horn-maker, or even horn-blower.^[1]

• Alison Horner (born 1966), British businesswoman
• Arthur Horner (disambiguation), several people
• Benjamin Bean Horner (1893–1971), American architect and photographer
• Billy Horner (born 1942), English footballer and manager
• Bob Horner (born 1957), American baseball player
• Brigitta Horner (1632-1640), German child witch; see Witchcraft accusations against children
• Chris Horner (born 1971), American bicyclist
• Christian Horner (born 1973), team principal of the Red Bull Racing Formula One team
• Christopher C. Horner, American attorney and author
• Chuck Horner (born 1936), American General
• Constance Horner (born 1942), American public official and businesswoman
• Craig Horner (born 1983), Australian actor
• Cynthia Horner, American writer and magazine editor
• David Horner (born 1948), Australian military historian
• Francis Horner (1778–1817), Scottish politician and economist
• George William Horner (1849–1930), biblical scholar
• Geri Horner (born 1972), British singer
• Henry Horner (1879–1940), Illinois Governor
• Jack Horner (disambiguation), the name of several persons
• James Horner (1953–2015), American film composer
• Jocelyn Horner (1902–1940), English sculptor
• Johann Caspar Horner (1734–1834), Swiss physicist and astronomer
• Johann Friedrich Horner (1831–1886), ophthalmologist, Horner's syndrome
• John Henry Horner(1927–2004; Cactus Jack), Canadian rancher and political cabinet minister
• John Horner (disambiguation), the name of several persons
• Leonard Horner (1785–1864), Scottish geologist
• Norman Gerald Horner (1882–1954), English physician and medical editor
• Penelope Horner (born 1939), British actress
• Phil Horner (born 1966), English footballer
• Red Horner (1909–2005), Canadian hockey player
• Stephanie Horner (born 1989), Canadian swimmer
• Violet Horner, silent film actress
• William George Horner (1786–1837), British mathematician, the namesake of the Horner scheme
• William Horner (cricketer) (1830–1905), English cricketer
• Yvette Horner (1922–2018), French accordionist