Postel is a surname, and may refer to:
Christian Heinrich Postel (1658–1705), German jurist, epic poet and opera librettist
Georg-Wilhelm Postel, a World War II German general
Gert Postel, a German impostor
Guillaume Postel, a French polymath
Jon Postel, an Internet pioneer
Kaitlynne Postel, a competitor for Miss America 2008
Sandra Postel, founder of the Global Water Policy Project
