The character of Hank Hill is based on a character in Mike Judge's Beavis and Butt-Head (1993) by the name of Tom Anderson who acted and talked exactly like Hank. Also Hank's catchphrase of "That boy ain't right" was from an episode of "Beavis..." when they're at Burger World and Tom Anderson comments on Beavis by saying "That boy ain't right in the head."
The school which Bobby Hill attends, Tom Landry Middle School (named after the Dallas Cowboys football coach), really does exist. It is located in Irving, Texas in the sub-division of Valley Ranch, just a few blocks down MacArthur Blvd. from the Dallas Cowboys' Office and Training Facility (most of the streets in the neighborhood are also named after Dallas Cowboy greats).
Stephen Root was uncredited during the first few seasons. This was because he was also on NewsRadio (1995) and his contract prevented him from being credited on another network's show. After the show was cancelled in 1999, he was able to be credited for "King of the Hill".
Hank, Bobby, Peggy, Luanne, Bill, Dale, and Boomhauer were animated into an episode of The Simpsons (1989). At one point, Homer makes a reference to the Springfield football team playing the Arlen football team, then, the shot goes to the Hill family, where Hank says "We came two thousand miles for this?" The rest of the characters do not speak. In an episode of King of the Hill, Bobby also has a Bart Simpson doll on his bookshelf.
The Luann Platter is a type of combination plate available at Luby's Cafeteria, a popular restaurant in Texas (In the show, it's referred to as "Luly's"). It has a meat, a roll, and a side for a low price.
Dale Gribble's last name is a tribute to Mike, who died of cancer in 1994. Gribble, along with Spike, founded the "Spike and Mike" Sick and Twisted Festival of Animation in San Diego. The Festival is considered the birthplace of Beavis and Butt-Head (1993), since Spike and Mike produced Mike Judge's first two Beavis and Butt-head shorts.
This show features the last television appearance of John Ritter, who reprised his role as Eugene Grandy (supplying the voice), the junior high school teacher during season 8. The episode was "Stressed for Success" which was broadcast on May 2, 2004.
There is no beer based on King of the Hill's "Alamo Beer". The Real Ale beer is actually called "Remember Alamo Golden Ale" but only in San Antonio, everywhere else it is called "Real Ale Firemans #4".
King of the Hill was passed over for renewal in September 2005, which would have made season ten its final season. The order for new episodes was only made after production had ended on the show. The renewal for the eleventh season was due to the high ratings of season ten.
In the episode with the diving pig at the fair, the pig's most difficult dive is called the "Johnny Cash", and it must dive through a flaming ring. This is a direct reference to Johnny's song "Ring Of Fire".
How and when the show's last episodes would air became a point of uncertainty after Fox officially canceled it early in 2009. The network originally planned to show unaired Season 13 episodes at some point in the early 2009-10 season. It was later speculated that ABC would pick up the show for a 14th season but the idea was shot down by ABC's president. Fox later said it would not air any of the S13 episodes and fans believed they would premiere on either the cable Cartoon Network or a season DVD. In the end, two new episodes comprising a series finale aired on Fox on September 13, 2009.
Hank is seen as owning two pickup trucks in the series. At the start of the series, he drives a 97 Ford Ranger. Later in the series, when he is forced to replace his truck due to it being hit by a train, he upgrades to a Ford F-250. (The model year is unknown, but, the body style was in production from 1999-2006.)
Throughout the series, on the rare occasion that Bobby is seen playing Little League, he wears #3. This is in homage to Babe Ruth, another husky baseball player. This connection is confirmed in the episode "Bad News Bill" when the coach refers to him as "Great Bobino", a nod to Ruth's nickname of "Great Bambino".
Following the season 2 cliffhanger ending, rumors begin spreading through various FOX commercials and promotional spots that the Hills would be moving to Hollywood. TV Guide ads and the like even touted Propane Boom (the season 2 finale) as the "last episode in Texas!" This was all later, of course, revealed to be a hoax - actually meaning that show show itself (not the characters on the show) was moving to another night on the network - a move that nearly killed the series. Fortunately this was later rectified and the show eventually regained the coveted Sunday night prime time slot for the remainder of its run.