Dreyer is a common German surname. Notable people with the surname include:
Benedikt Dreyer (1495–1555), German sculptor, carver and painterCarl Theodor Dreyer (1889–1968), Danish directorDekker Dreyer (1980– ), American director and producerEdward L. Dreyer (1940–2007), American historian of Ming ChinaFrederic Charles Dreyer (1878–1956), officer of the Royal NavyHenry Dreyer (1911–1986), American athleteJim Dreyer (1963— ), marathon swimmerJohn Dreyer (1852–1926), Danish-Irish astronomerMalu Dreyer (born 1961), German politician (SPD)Olaf Dreyer, German theoretical physicistPam Dreyer (1981— ), American ice hockey playerPeter Dreyer (1939— ), South African writer and politician