Casaubon /kəˈsɔːbən/ is a surname. Notable people with the surname include:

• Isaac Casaubon (1559–1614), French classical scholar
• Méric Casaubon (1599–1671), French-English classical scholar, son of Isaac
• Marcelo Ebrard Casaubón (born 1959), head of government of the Mexican Federal District

Fictional characters:

• Edward Casaubon, character in Middlemarch, 1871–72 novel by George Eliot
• Casaubon (no first name given), character in Foucault's Pendulum, 1988 novel by Umberto Eco
• Casaubon, the name of a character in several of Mary Gentle's works

This page lists people with the surname Casaubon.
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