Reitz is a surname of German origin. Notable people with the surname include:
Christopher Reitz (born 1973), German field hockey goalkeeper
Curtis R. Reitz (born 1930), Algernon Sydney Biddle Professor of Law at the University of Pennsylvania Law School
Deneys Reitz (1882–1944), South African writer and statesman
Edgar Reitz (born 1932), German filmmaker
Erik Reitz (born 1982), ice hockey player
Francis Reitz (disambiguation), several people
Gijs Bosch Reitz (1860–1938), Dutch painter
Hans Walter Reitz (1888–1955), German architect of New Objectivity (architecture)
Heinie Reitz (1867–1914), American baseball player
Heinrich Reitz, German rugby union international
Joe Reitz (born 1985), National Football League player for the Indianapolis Colts
J. Wayne Reitz (1908–1993), fifth president of the University of Florida (1955–1967)
Karl Reitz (1887–1943), German musician, also refer to Busch Quartet and August Heinrich Bruinier
Ken Reitz (born 1951), former Major League Baseball player