Julius M. Hibbert, M.D. is a fictional doctor and physician on the TV series The Simpsons. He is voiced by Harry Shearer.

Dr. Hibbert is the Simpsons' (usually) kind-hearted family doctor, a genius, a graduate of the Johns Hopkins University School of Medicine and Mensa member, and is one of the few regular African-American characters on the series. Hibbert is noticeably less dysfunctional than just about everyone else on the show, though he does have a bizarre tendency to laugh at inappropriate moments. He also gives questionable solutions to certain medical problems. For example, when Maggie saved Homer from drowning, he replied to Marge's question "How can a baby save the life of a full-grown man?", "It's very simple. When an adult's life is in danger, a child can summon superhuman strength!" In "Maximum Homerdrive", when Homer challenged Red Barclay to eat the "Sir Loin-a-Lot" steak in a contest, Marge feared that Homer may choke on a part of the steak, while Dr. Hibbert claims that since being 12% owner of The Slaughterhouse (the restaurant they were eating at), his dietary advice suggests "the occasional eating contest".