Castell is a surname of English , French or Catalan origin. Notable people with the surname include:
- Adela Castell (1864âÂÂ1926), Uruguayan educator, writer, and poet
- Alan Castell (1943âÂÂ2024), English cricketer
- David Castell, American record producer, musician and recording engineer
- Edmund Castell (1606âÂÂ1685), English orientalist
- John Castell (aka John Castle), 15th-century Master of University College, Oxford, and a Chancellor of the university
- Jordan Castell, American football player
- José MarÃÂa Castell (1896âÂÂ1981), Spanish footballer
- Lacksley Castell (1962âÂÂ1984), Jamaican reggae singer
- Patricia Castell (1926âÂÂ2013), Argentine actress
- Sir William Castell (born 1947), British businessman