Sandwith is a surname. Notable people with the surname include:
Map of Sandwith, Whitehaven, UK
Arnold Sandwith Ward (1876–1950), journalist and Conservative Member of Parliament
Charles Sandwith Campbell (1858–1923), benefactor who gave the City of Montreal the Campbell Concerts and Campbell Parks
Bill Sandwith (1922–99), Australian politician
Kevin Sandwith (born 1978), English professional football player
Noel Yvri Sandwith (1901–65), botanist at the Royal Botanic Gardens, Kew
Terran Sandwith (born 1972), retired Canadian professional ice hockey player
