Bobby Hill in the new "King of the Hill" revival is 21 years old. The series, which originally featured Bobby as an 11 to 13-year-old boy, has aged the characters appropriately in the new season released in 2025. Bobby is now depicted as a confident 21-year-old chef living in Dallas. This significant change marks his transition from the comedic, arts-oriented child to a young adult navigating adulthood, continuing to reflect his kind and quirky personality.