A cornet is a brass instrument that closely resembles the trumpet.

Cornet or Kornet may also refer to:

Military Cornet (rank), a commissioned officer rank in cavalry troops, once the bearer of the Troop's flag or Cornet 9M133 Kornet, a Russian anti-tank guided missile Fähnrich, an Austrian and German officer candidate rank since 1899, previously a Cornet (who carried the cornet/flag) c. 1480 in Germany

Name Adele Passy-Cornet (1838–1915), née Cornet, German opera singer Alizé Cornet (born 1990), French tennis player Bruno Cornet (born 1977), Paraguayan fencer Franziska Cornet (1808–1870), German opera singer George Cornet (1877–1952), Scottish water polo player Henri Cornet (1884–1941), French cyclist Jacobus Ludovicus Cornet (1815–1882), Dutch painter Jan Cornet (born 1982). Spanish actor Jordi Cornet (1965–2021). Spanish politician Joseph-Aurélien Cornet (1919–2004), Belgian ethnologist Julius Cornet (1793–1860), Austrian opera singer and theatre director Manu Cornet (born 1981), French cartoonist Maxwel Cornet (born 1996), Ivory Coast footballer Nicolas Cornet (1572–1663), French theologian Paul Cornet (1892–1977), French sculptor, teacher Pedro Cornet (born 1946), Paraguayan fencer Peeter Cornet ( – 1633), Dutch composer Philippe Cornet (born 1990), French ice hockey player Raimon de Cornet (), French troubadour Ramón Gómez Cornet (1898–1964), Argentine painter Severin Cornet ( – 1582), Franco-Flemish composer

Places Romania Cornet, a village in Brusturi, Bihor County Cornet, a village in Poduri, Bacău County Cornet, a village in Vaideeni, Vâlcea County Cornet, a tributary of the Bucureșci in Hunedoara County Cornet, a tributary of the Holod in Bihor County Cornet, a tributary of the Sălătrucel in Vâlcea County

Elsewhere Cornet, Washington, a community in the United States Cornet Bay, a bay in the U.S. state of Washington Castle Cornet, a castle on an island (Cornet Rock) close to Guernsey The Cornet, a peak in the South Shetland Islands of Antarctica

Other Cornet (hat): hennin Cornet (hat component): lappet Cornetfish Cornet (organ stop) (pronounced "cornay"), a composite stop on an organ consisting of the 8', 4', 2-2/3', 2', and 1-3/5' stops Cornet, a British English synonym for ice cream cone Cornet (bread), a Japanese sweet bun often filled with chocolate The main character in the PlayStation video game Rhapsody: A Musical Adventure Kornet, a potato snack food in the Philippines produced by Granny Goose Cornet River (disambiguation) Cornet (sculpture), a 1984 outdoor concrete and steel sculpture by David Adickes The Cornet (film), a 1955 West German film

See also Cornette, a kind of medieval headgear Cornett (disambiguation) Coronet (disambiguation)