Chanmugam is a surname. Notable people with the surname include:
Dennis Chanmugam (born 1948), Sri Lankan cricketer Dipika Chanmugam (born 1972), Sri Lankan swimmer Ganesar Chanmugam (1939–1996), Sri Lankan astrophysicist J. C. Chanmugam, Surveyor General of Sri Lanka Neil Chanmugam (1940–2014), Sri Lankan cricketer
See also 16107 Chanmugam, minor planet