Hennings is a surname. Notable people with the surname include:
Chad Hennings (born 1965), American football defensive lineman
Emmy Hennings (1885–1948), German performer and poet
Ernest Martin Hennings (1886–1956), American painter, member of Taos Society of Artists
Rouwen Hennings (born 1987), German football player
Andrew Hennings and Kate Hennings, fictional characters