Heyer is a surname. Notable people with the surname include:
Carl Justus Heyer (1797–1856), German professor of forestry Conrad Heyer (1749–1856), one of the earliest-born men to have been photographed Friedrich Casimir Gustav Heyer (1826–1883), German professor of forestry Georgette Heyer (1902–1974), English novelist Hans Heyer (born 1943), German racing driver John Heyer (1916–2001), Australian documentary filmmaker John Christian Frederick Heyer (1793–1873), American missionary John Henry Heyer (1831–1905), American politician Hans-Joachim Heyer (1920–1942), German Luftwaffe ace Laurie Heyer, American mathematician Moritz Heyer (born 1995), German footballer Sascha Heyer (born 1972), Swiss beach volleyball player Shane Heyer (born 1964), Canadian ice hockey linesman Stephon Heyer (born 1984), American footballer Volker Heyer (born 1970), German judoka