Casson may refer to the following people:

Given name

• Casson Ferguson (1891–1929), American film actor
• Casson Trenor, American environmentalist, social activist, and media personality

Surname

• A. J. Casson (1898–1992), Canadian artist
  • A. J. Casson Award
• Amy Casson, British slalom canoeist
• Andrew Casson (born 1943), Anglo-American mathematician
  • Casson invariant
  • Casson handle
• Ann Casson (1915–1990), English stage and film actress
• Beau Casson (born 1982), Australian cricketer
• Christopher Casson (1912-1996), English-born actor who became a citizen of Ireland in 1946
• Elizabeth Casson (1881–1954), British doctor and occupational therapy pioneer
• Felice Casson (born 1953), Italian magistrate and politician
• François Boux de Casson (1908–1981), French aristocrat, landowner and politician
• Henry Casson (1843–1912), American politician
• Henry Casson (cricketer) (1830–1902), English cricketer
• Herbert Newton Casson (1869–1951), Canadian author and journalist
• Hugh Casson (1910–1999), British architect
• Jacob Casson Geiger (1885-1981), city director of public health in San Francisco and Oakland, CA
• Johnnie Casson, English comedian
• Leslie Casson (1903–1969), English mediaevalist and art historian
• Lewis Casson (1875–1969), British actor, father of Ann
• Lionel Casson (1914–2009), American classicist
• Margaret Casson (1913–1999), British architect, designer and photographer, wife of Hugh
• Mark Casson (born 1945), British economist and academic
• Mary Casson (1914–2009), English theatre access
• Mel Casson (1920–2008), American cartoonist
• Michael Casson (1925–2003), English studio potter
• Rick Casson (born 1948), Canadian politician
• Tom Casson (born 1990), English rugby union player
• Walter Casson (1895–1965), English football forward
• William Casson (1796–1886), English botanist, seed merchant and historian
• William Thompson Casson (1844–1909), English coach designer and manufacturer