Carl or Karl Johnson may refer to:
Politicians Carl L. Johnson (1898–1958), American businessman and politician Carl M. Johnson (1933–2025), American businessman, farmer and politician
Scientists Carl J. Johnson (1929–1988), American public health physician who opposed nuclear testing Karl Johnson (virologist) (1929–2023), American researcher and academic Carl H. Johnson, American biologist and academic, active since 1970s Karl G. Johnson, American neuroscientist and academic, active since 1990s
Sportsmen Karl Johnson (wrestler) (1883–1952), Swedish Olympic competitor Carl Johnson (soccer) (1892–1970), American midfielder and Olympian Carl Johnson (long jumper) (1898–1932), American track-and-field Olympic medalist Carl Johnson (American football) (born 1949), offensive lineman with New Orleans Saints Karl Johnson, American college football player during 1980s (List of NCAA football records) Karl Johnson (rugby league), New Zealand Maori centre or second-row since 2000s
Others Carl C. Johnson (1926–2023), African American aviator, one of Tuskegee Airmen in 1946 Karl Johnson (actor) (born 1948), Welsh stage, film and TV performer Karl Baldwin Johnson (born 1961), Baptist minister and since 2025 president of the Baptist World Alliance (BWA).
Fictional characters Carl Johnson (Grand Theft Auto), video game protagonist of 2004's Grand Theft Auto: San Andreas
See also Karl Jónsson (1135–1213), Icelandic writer, poet and clergyman Carl Jonsson (1885–1966), Swedish tug-of-war competitor Charles Johnson (disambiguation)