Casadevall is a surname and a given name. Notable people with the name include:
Surname: Arturo Casadevall, professor of Molecular Microbiology & Immunology and Infectious Diseases at the Johns Hopkins Bloomberg School of Public Health and Johns Hopkins School of Medicine Josep Casadevall (born 1946), Andorran lawyer born in Spain, judge of the European Court of Human Rights in respect of Andorra Josep Maria Valles i Casadevall (born 1940), Spanish academic and politician Josep Pla i Casadevall (1897–1981), Spanish journalist and a popular author Maria Casadevall (born 1987), Brazilian actress
Given name: Enric Casadevall Medrano, Andorran politician