Dengel is a surname. Notable people with the name include:
Anna Maria Dengel, (1892–1980), Austrian physician, religious sister and missionary Edward J. Dengel (1866–1943), American politician and businessman Lebna Dengel or Dawit II (1496–1540), Emperor of Ethiopia from 1508 to 1540 Philipp Dengel (1888–1948), German communist journalist and politician Sahle Dengel (1778–1855), Emperor of Ethiopia between 1832 and 1855 Sarsa Dengel (1550–1597), Emperor of Ethiopia, known as Sarsa the Great Za Dengel (died 1604), Atsnaf Sagad II, Emperor of Ethiopia from 1603 to 1604
See also Dengel Ber, town in western Ethiopia