Buhagiar is a surname concentrated mainly in Malta, which may be its originating country too. Notable people with the surname include:
Antonio Maria Buhagiar (1846–1891), born Spiridion Buhagiar, Catholic bishop Francesco Buhagiar (1876–1934), Maltese politician Gio Nicola Buhagiar (1698–1752), Maltese painter Mario Buhagiar (1945–2026), Maltese author Richard Buhagiar (born 1972), Maltese-Australian professional footballer Tony Buhagiar (born 1955), Australian rules footballer Trent Buhagiar (born 1998), Australian professional footballer Valerie Buhagiar (born 1963), Maltese-Canadian actress, film director and television host (born 1965), Romanian stage designer