Postel is a surname, and may refer to:Guillaume Postel (1510–1581), French linguist, astronomer, Cabbalist, diplomat, and religious universalist Christian Heinrich Postel (1658–1705), German jurist, poet and opera librettist Georg-Wilhelm Postel, World War II German general Gert Postel, German impostor Jon Postel, Internet pioneer Kaitlynne Postel, competitor for Miss America 2008 Sandra Postel, founder of the Global Water Policy Project