Grimstad is a Norwegian surname. Notable people with the surname include:
Birgitte Grimstad (born 1935), Danish-born Norwegian musician Carl M. Grimstad (1856–1940), American politician Carl-Erik Grimstad (born 1952), Norwegian politician Edvard Grimstad (1933–2014), Norwegian politician Gudmund Grimstad (1898–1970), Norwegian wrestler Lars Joachim Grimstad (born 1972), Norwegian football midfielder May-Helen Molvær Grimstad (born 1968), Norwegian politician Oskar Jarle Grimstad (born 1954), Norwegian politician Per Ø. Grimstad (born 1934), Norwegian businessperson, diplomat and politician Renate Grimstad (born 1997), Norwegian golfer
See also Grimstad (disambiguation)