Galsworthy is a surname. Notable people with the surname include:
Anthony Galsworthy (born 1944), British diplomat Arthur Galsworthy (1916–1986), British soldier and diplomat John Galsworthy (1867–1933), English novelist and playwright John Galsworthy (diplomat) (1919–1992), British diplomat Marilyn Galsworthy (born 1954), British actress Mike Galsworthy (born 1976), British scientist and activist Robert Galsworthy (born 1989), Australian weightlifter