Buddhadasa is a Buddhist title, as well as a given name and a surname. Notable people with the name include:

Buddhadasa (1906–1993), Thai Buddhist monk Buddhadasa of Anuradhapura, King of Anuradhapura Buddhadasa Vithanarachchi (born 1947), Sri Lankan actor A. M. Buddhadasa, Sri Lankan politician Lal Chamika Buddhadasa, Sri Lankan politician