Fischbach is a German-origin surname. Notable people with the surname include:
Adolf Fischbach (1920–1972), Oberleutnant in the Luftwaffe during World War II
Friedrich Fischbach (1839–1908), German textile designer
Gerald Fischbach (born 1938), American neuroscientist
Greg Fischbach, founder of video game publisher Acclaim Entertainment
Johann Fischbach, (1797-1871), Austrian painter
Johannes Fischbach (born 1988), German mountain biker
Marc Fischbach (born 1946), Luxembourg politician
Marcel Fischbach (1914–1980), Luxembourg politician, journalist, and diplomat
Michelle Fischbach (born 1965), Minnesota politician
Oskar Georg Fischbach (1880–1967), German lawyer
Mark Fischbach (born 1989), American entertainer
