Grimmer is a surname. Notable people with the surname include:
Abel Grimmer (c. 1570–c. 1620), Flemish painterGeorge S. Grimmer (1826–1887), Canadian lawyer and politicianGerhard Grimmer (born 1943), East German cross-country skierJack Grimmer (born 1994), Scottish footballerJacob Grimmer (c. 1526–1590), Flemish painterMargot Grimmer (born 1944), American ballet dancerRobert Watson Grimmer (1866–1948), Canadian merchant and politicianW.C.H. Grimmer (1858–1945), Canadian lawyer and politician