Karl may refer to:
People
Karl (given name), including a list of people and characters with the name
Karl der Große (748–814), commonly known in English as Charlemagne
Karl of Austria (1887–1922), last Austrian Emperor
Karl (footballer) (born 1993), Karl Cachoeira Della Vedova Júnior, Brazilian footballer
Karl Jacobs (born 1998) American content creator known mononymously as Karl
Karl (surname)
In myth
Karl (mythology), in Norse mythology, a son of Rig and considered the progenitor of peasants (churl)
Karl, giant in Icelandic myth, associated with Drangey island
Vehicles
Opel Karl, a car
ST Karl, Swedish tugboat requisitioned during the Second World War as ST Empire Henchman
Other uses
Karl, Germany, municipality in Rhineland-Palatinate, Germany
Karl-Gerät, AKA Mörser Karl, 600mm German mortar used in the Second World War
Korean Amateur Radio League, a national non-profit organization for amateur radio enthusiasts in South Korea
KARL, a radio station in Minnesota
List of storms named Karl, a number of named tropical cyclones
Karl the fog, a local San Francisco bay area term referring to the climatically reliable fog
Karl's Building, a building in Los Angeles, California