Strickland Propane
- Buck Strickland (voiced by Stephen Root) — Buck is the overweight, balding, over-the-hill owner of Strickland Propane, and Hank's boss. Originally hailing from Arkansas, Buck is a compulsive gambler, chauvinist, alcoholic, cheat, adulterer, and womanizer. Buck has a habit of calling Hank "old top". Hank is blindly loyal to Buck, preferring to view his boss as the idealized American entrepreneur while turning a blind eye to his failings, except when Buck's behavior threatens the immediate welfare of Hank's family. Despite such flaws, Buck trusts Hank and his judgment completely, calling him "the golden goose".
- Joe Jack (voiced by Toby Huss) — Joe Jack is a fuel-truck driver and co-worker with Hank at Strickland Propane. He has a drinking problem, as seen when he is a member of the Propaniacs, and it has also been stated that he has a gambling problem as well. One of his known gambling buddies is Buck Strickland. He has a habit of calling people "honey," regardless of gender. In one episode, it's revealed that Joe Jack did something so bad at Taco Bueno that he's not allowed to play on the company softball team. He also admitted to Hank during a sleep-over at Strickland Propane that he had been locked up before.
- Enrique (voiced by Eloy Casados from 1997–1998, Danny Trejo from 2002–2009) — Enrique is a good-natured Hispanic truck driver at Strickland Propane. When he first appears, he is a much more soft-spoken character, and it is implied that he came to work in the United States to support his family back home - although later episodes clearly depict his family as living in Arlen (perhaps he sent for them once he had made enough money, though.) In later appearances, his manner of speaking changes entirely and he becomes a loud-mouth, annoying member of the Strickland Propane family - though he's still a good man with well-meaning intentions. In the episode "Enrique-cilable Differences," Hank and Enrique had hardly ever talked to each other before, much to Hank's satisfaction, but suddenly Enrique forcibly befriends Hank after a nasty fight with his wife. Enrique ends up moving in with the Hills for a short time, but quickly patches things up with his wife after a fed-up Hank kicks him out. He thinks the world of Hank, even asking him to speak at his daughter's quinceanera instead of Buck Strickland. He eventually became a homeowner through Peggy's efforts. Enrique has made several appearances over the entirety of the show's run.
- Debbie Grund (voiced by Reese Witherspoon) — Debbie was an employee of Strickland Propane and was Buck Strickland's mistress and the main antagonist in "Hanky Panky". When Strickland ended their relationship, she waited in Hank's pickup truck in her underpants in order to seduce Hank on account of his promotion, but Hank immediately rebuffed her and drove off. As revenge for Buck ending the relationship and Hank's declination of her advances, Debbie plotted to murder the Stricklands and the Hills, but accidentally killed herself when she inadvertently discharged Buck's shotgun onto herself while attempting to climb into the dumpster she was using as a hiding place.
- Donna (voiced by Pamela Adlon) — There are actually two separate Donnas who have both worked as Strickland accountants, and are often referred to as "Donna from Accounting". The first Donna appears, albeit infrequently, as an overweight, dark-skinned woman, most notably in "Meet the Propaniacs". Hank notes on one occasion that she has kids. In "Are You There, God? It's Me, Margaret Hill", Buck mentions having discovered stolen office supplies in her bedroom (presumably during an extramarital encounter), and orders Hank to "find us a new Donna". The "new Donna" is a tall, curvy white woman who first appears in "The Miseducation of Bobby Hill". In "24 Hour Propane People" she mentions a husband; in "You Gotta Believe (In Moderation)", Dale notes her "recent divorce". In "Lost in MySpace", her most significant episode, she is briefly promoted to assistant manager alongside Hank, but later fired, and later still re-hired as accountant. It is also implied (from her MySpace page) that she may be bisexual and has slept with several co-workers, including Buck. However, this might have just been a stunt she pulled to boost Strickland's page.
- Roger "Buddha" Sack (voiced by Chris Rock in the first appearance, Phil LaMarr in later appearances) — He first appeared in "Traffic Jam" as a comedian and traffic school instructor. His abrasive and insulting style of humor infuriates Hank, as well as the dean of the traffic school, who is able to act upon Hank's complaint that no traffic lessons are being taught in order to finally fire Sack. However, Bobby idolizes him. When Roger saves Bobby from an angry crowd at Bobby's unintentionally racist stand-up act, Hank helps him become an employee of Strickland Propane. He does make appearances in later episodes as a Strickland employee, including introducing Hank to the world of video games when he must study one the potentially infringes on Strickland copyrights, and giving him a test to determine if he is a racist (when Hank has been accused by much of the community.) It is also implied that when Buck Strickland was going through his divorce, the item Roger was being given to hold on to temporarily was a scimitar. The term "Buddha Sack" orgininated in the early 1990s as a street term for a bag of marijuana though no marijuana related jokes seem to come from this name being included in the show.
- Elizabeth "Miz Liz" Strickland (voiced by Kathleen Turner) — Elizabeth is the deep-voiced, long suffering wife of Buck Strickland, first seen in "Hanky Panky". Her hair is always pulled up tightly in a bun. Buck Strickland has an Italian scattergun with her name engraved on it. In "Hanky Panky", the first half of a two-part episode, Miz Liz attempts to seduce Hank in a propane-powered hot tub during her and Buck's separation, but the interest was not reciprocated. She and Buck reconcile in the second half "High Anxiety", but later on, in "The Good Buck", Buck claims that Miz Liz has left for good, stating that "she could handle my drinkin' binges, and my gamblin', and even turn a blind eye to my extramarital escapades, but not when they happen all once! ...and on her birthday!"
Read more about this topic: List Of King Of The Hill Characters