Reinsch is a Germanic surname. It may refer to:
Diether Roderich Reinsch (born 1940), a German Byzantinist Gabriele Reinsch (born 1963), a German track and field athlete Hugo Reinsch (1809–1884), a German chemist and botanist J. Leonard Reinsch (1908–1991), an American broadcasting executive Paul Friedrich Reinsch (1836–1914), a botanist Paul Samuel Reinsch (1869–1923), an American political scientist and diplomat William Alan Reinsch (born 1947), an American government official