Garnsey is a surname. It may refer to:
Bruce H. Garnsey Charles Frederick Garnsey (1828–1894), Anglican priest Daniel G. Garnsey (1779–1851), American politician David Garnsey (1909–1996), Australian bishop George O. Garnsey (1840–1923), American architect Peter Garnsey (born 1938), British historian
See also Garnsey kill site, New Mexico, USA