Clairmont is a surname of French origin. It is ultimately connected to the Latin word clarus, meaning "clear" or "bright." Notable people with the surname include:
Claire Clairmont (1798–1879), stepsister of writer Mary Shelley Corwin Clairmont (born 1946), Native American printmaker and artist Frederic F. Clairmont, Canadian economist Philip Clairmont (1949–1984), New Zealand artist Wayne Clairmont (born 1943), Canadian former professional hockey player