Sandig is a surname. Notable people with the surname include:
Curt Sandig (born 1918), American football player Jochen Sandig (born 1968), German cultural entrepreneur Madeleine Sandig (born 1983), German cyclist Marita Sandig (born 1958), German rower Rudolf Sandig (1911–1994), German SS officer Ulrike Almut Sandig (born 1979), German writer