King of the Hill has a lot of characters, so this page has been split into Six.
- The Hills (and relatives)note Hank Hill, Peggy Hill, Bobby Hill, Luanne Platter, Ladybird, Cotton Hill, Tilly Hill, Didi Hill, Junichiro, Leanne Platter, Hoyt Platter, Lucky Kleinschmidt, G. H. Hill
- The Hills' Neighborsnote Bill Dauterive, Boomhauer, Dale Gribble, Nancy Gribble, Joseph Gribble, Khan Souphanousinphone, Minh Souphanousinphone, Connie Souphanousinphone
- Strickland Propanenote Buck Strickland, Elizabeth "Miz Liz" Strickland, Joe-Jack, Enrique, Debbie Grund, Donna, Roger "Booda" Sack, Tammi Duvall, Melinda Grab
- Other Charactersnote John Redcorn, M.F. Thatherton, Ted Wassonasong, Chane Wassonasong, Principal Carl Moss, Clark Peters, Stuart Dooley, Jimmy Wichard, Chris Sizemore, Octavio, Chuck Mangione, Mark Buckley, P.J. Finster, Anthony Page, Bob Jenkins, Reverend Karen Stroup, Officer Brown, Coach Sauers, Coach Kleehammer, Hal, Lane Pratley, Emily, Lenore Dauterive, Gilbert Dautrieve