Bobby Hill is a cartoon character on the animated television show King of the Hill. Born Robert Jeffrey Hill, he is the only child of Hank and Peggy Hill. Overweight and lacking strength, Bobby is not suited for sports, nor is he useful with his hands, making him a comic foil to his ex-high-school-football-playing, tool-savvy father. Different as night and day, they eventually form a relationship based on an understanding of these differences. Bobby Hill was once sent to Fort Berk, a military academy where his grandfather Cotton Hill attended as a young man. He is also friends with Joseph Gribble and next door neighbor Connie Souphanousinphone. Bobby has aspired to be a ladies' man, runway model, proctologist, comedian, shaman, and a salesman of propane and propane accessories. In later seasons he served as the mascot for his middle school football team, the Tom Landry Longhorns. His father is occasionally embarrassed by Bobby's sometimes effeminate mannerisms, but Bobby most of all wants his father to be proud of him.

Bobby once ate a 72-ounce steak in a mere 37 minutes.