This is a list compiling the various recurring and notable inmates seen within the confines of Superjail. Official names are in bold, and are either given in the show or in the scripts or outside materials (ie: interviews, commentaries, production crew comments).
Inmates with their own articles are linked through here. "N/A" indicates the inmate has never spoken, while question marks listed in the voice category indicate that the voice actor is unknown or unconfirmed. There may also be cases where minor and background inmates' voice actors change, depending on the given appearance.
Main/Recurring inmates[]
These nine inmates are depicted the most in the show, and tend to have the more significant roles in the later seasons.
Jean, Paul, Gary, and Fatty were recurring characters in season 1, while Turban showed up in sporadic cameos and Ash and Nicky were initially intended as one-shot characters. Lord Stingray was added in season 2, with the intent to expand the main and recurring cast.
| Name | First Appearance | Voice Actor | Description | Image |
|---|---|---|---|---|
| Jacknife | Bunny Love | Christy Karacas (grunts) | A repeat offender constantly apprehended by Jailbot, yet usually escapes the jail to wind up caught again. | 
|
| Gary and Bird (alternatively: Bird and Gary) | Bunny Love | N/A | A silent inmate and his bird. Very dangerous. | 
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| Jean-Baptiste Le Ghei | Bunny Love | Stephen Warbrick | The quieter, gruffer half of the "Gay Inmates" duo. | 
|
| Paul Guaye | Bunny Love | Christopher McCulloch | The more effeminate and flamboyant of the "Gay Inmates". | 
|
| Fatty | Bunny Love | Stephen Warbrick | A balding, obese inmate. Lecherous and often killed or humiliated. | 
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| Nicky | Superbar | Christopher McCulloch | A crafty inmate with a New York accent. | 
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| Turban/Turbaned Inmate | Superbar | Christopher McCulloch | A Middle-Eastern inmate. | |
| Ash Firin | Mr. Grumpy-Pants | Christopher McCulloch | A heavily-burnt and disfigured inmate with pyrokinetic abilities. | 
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| Lord Stingray | Lord Stingray Crash Party | Eric Bauza | A supervillain overlord who was imprisoned at the jail. | 
|
Semi-recurring inmates[]
These inmates either show up mostly in the background in multiple episodes, or their roles are much more limited than the above characters.
Many of them are unnamed due to their status as background characters, although a few of them have had speaking parts on occasion.
| Name | First Appearance | Voice Actor | Description | Image |
|---|---|---|---|---|
| "Skinny"/Starving Inmate | Bunny Love | Christopher McCulloch | A perpetually-starving, emaciated inmate. | 
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| "Sweet Cheeks" | Superbar | Dee Bradley Baker (uncredited) | Alice's unwilling "boyfriend", who is tormented by her. | 
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| Redneck Inmate | Superbar | Christopher McCulloch | A red-haired hillbilly inmate. | |
| "Inmate XA24LXU" | Superbar | Richard Mather | A bald black inmate with a paw-print tattoo on his head. | |
| Bald Inmate with mustache | Superbar, Mr. Grumpy-Pants (speaking) | ??? | A bald white inmate with a gray handlebar mustache. This design was also briefly recycled for an inmate in Special Needs. | |
| Unibrowed Inmate | Superbar | Richard Mather | A hairy, bearded and balding inmate with a unibrow. | |
| Goateed Asian Inmate | Superbar, Terrorarium (speaking) | Stephen Warbrick | An Asian inmate with a buzzcut and goatee. | |
| Inmate with false arm | Superbar | N/A | An inmate with a scar over one eye, and a prosthetic left arm. | |
| Neo-Nazi | Superbar, Time-Police Part 2 (speaking) | Maurice LaMarche (uncredited) | A white supremacist inmate with dilated blue eyes. Also notably seen fighting Crew-cut Inmate in Mayhem Donor. | |
| Bald Inmate with goatee | Superbar | N/A | A bald inmate with a goatee and slight mustache. | |
| Black Bored Inmate | Combaticus | Richard Mather | A bald black man with a gun tattoo and "DIE!" printed on his forehead. | |
| White Bored Inmate | Combaticus | Richard Mather | A gray-haired white man with a mullet and handlebar mustache. | |
| Ponytailed Asian Inmate/Half-Face Inmate | Combaticus, Special Needs (speaking) | John DiMaggio (uncredited) | An Asian inmate with a ponytail, and a Fu Manchu-style mustache. Implied to be the inmate who had half his face grafted on to Jared's in Mayhem Donor, as he appears disfigured that way in Special Needs (although owing to the loose continuity in the show, this design is also seen intact in a cameo in Ghosts). | |
| Crew-cut Inmate | Combaticus | Christopher McCulloch | First seen as one of the inmates chosen to compete in "Fight City". Later seen in Mayhem Donor. | |
| Hidden Eyes Inmate | Combaticus, Terrorarium (speaking) | Christopher McCulloch | An inmate with shaggy hair usually covering his eyes. Chosen to be one of the contestants in Terrorarium. | |
| Red-haired Juggalo Inmate | Cold-Blooded | Christopher McCulloch | An inmate modeled after Violent J of the Insane Clown Posse. | |
| "Pie Guy" | Mr. Grumpy-Pants | Richard Mather | A fat, pale, bald inmate with a pie tattoo reading "Pie Guy". | |
| Balding Asian Inmate | Best Friends Forever, Hot Chick (speaking) | Tom Kenny (uncredited) | A balding Asian inmate with facial hair. |
One-shot/Guest inmates[]
Although some of these inmates have made cameos in later episodes and seasons, their screentime is mostly limited to the specific episode that they debuted in.
Season 1[]
| Name | First Appearance | Voice Actor | Description | Image |
|---|---|---|---|---|
| Combaticus Target#1 | Combaticus | Richard Mather | The first inmate to be slaughtered by Combaticus. | |
| Tony | Ladies' Night | Christopher McCulloch | An inmate attending Jared's etiquette class. Gets stabbed to death by Rod. | |
| Rod | Ladies' Night | Richard Mather | Another inmate attending Jared's etiquette class. | |
| "Cold-Blooded" Killer | Cold-Blooded | Richard Steven Horvitz (grunts/uncredited) | The serial killer brought to the jail. Seen in a cameo at the race in Superjail! Grand Prix. | 
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| Dreadlocked Juggalo Inmate | Cold-Blooded | ??? | One of the Insane Clown Posse-inspired inmates. | |
| "Joey" | Cold-Blooded | Christopher McCulloch | An inmate with his makeup modeled after Joey Jordison, from Slipknot. | |
| "Craig" | Cold-Blooded | Christopher McCulloch | An inmate with his mask modeled after Craig Jones, from Slipknot. | |
| "Chris" | Cold-Blooded | ??? | An inmate with his mask modeled after Chris Fehn, from Slipknot. | |
| Mustachioed Juggalo Inmate | Cold-Blooded | ??? | A Juggalo inmate waiting in line to give Jared gifts. | |
| Flat-Top Juggalo Inmate | Cold-Blooded | ??? | Another Juggalo waiting in line for Jared. | |
| Bandaged-head Inmate | Cold-Blooded | Richard Mather | An inmate with bandages wrapped around his head. Possibly inspired by Corey Taylor, from Slipknot (minus the clown nose). | |
| Bobo | Terrorarium | ??? | An inmate affected by the growth serum. Seems to only say his own name. | |
| Furnace Worker | Mr. Grumpy-Pants | Stephen Warbrick | Ash's partner at the furnace. Tries to burn Cancer but gets thrown into the flames. Makes a return cameo in Planet Radio. | |
| "Inmate DGFKR" | Mr. Grumpy-Pants | ??? | One of the inmates that wants to see Cancer. | |
| Story-telling Inmate | Mr. Grumpy-Pants | ??? | An inmate that attempts to read a storybook to Cancer. | |
| Paranoid Inmate | Dream Machine | Richard Mather | An inmate that can't sleep due to the Dream Machine. He's balding, with long gray hair. Seen panicking with "XA24LXU". | |
| Inmate with corn rows | Time-Police Part 1 | ??? | An inmate pleased that he's free to kill (only to be killed by another inmate). | |
| Tribe Leader | Time-Police Part 2 | ??? | A white supremacist inmate leading one of the tribes that the jail split off into, who tells the story of "Su'Jael". | |
| Tribal Inmate #1 | Time-Police Part 2 | ??? | One inmate among the various tribes of the jail. | |
| Tribal Inmate #2 | Time-Police Part 2 | ??? | Another tribe member. | |
| Tribal Inmate #3 | Time-Police Part 2 | ??? | A tribe member that suggests to turn Superjail into a utopia. | |
| Bald Inmate with Muttonchops | Time-Police Part 2 | ??? | An inmate that attends the birth of the first bird-human hybrid. Comments "She's beautiful". |
Season 2[]
| Name | First Appearance | Voice Actor | Description | Image |
|---|---|---|---|---|
| Bearded Inmate | Mayhem Donor | Stephen Warbrick | An inmate that helps pilot the Superjail Mechadrill. His only line is a shout of "WE'RE ALL GONNA DIE!". | |
| "Crescent Moons" Leader | Hot Chick | Christopher McCulloch | Leader of a Muslim gang within the jail. | |
| "White Lightnings" Leader | Hot Chick | Christopher McCulloch | Leader of a Neo-Nazi gang. | |
| "Double Rainbows" Member | Gay Wedding | Christopher McCulloch | Attempts to cheer up Paul about his breakup. | |
| "Purple Pythons" Member#1 | Gay Wedding | Christopher McCulloch | Attempts to cheer up Jean. | |
| "Purple Pythons" Member#2 | Gay Wedding | Christopher McCulloch | Warns Jean of the Double Rainbows' return. | |
| Copy Boy | Ghosts | ??? | One of the inmates working at the newspaper department. | |
| Old Inmate | Ghosts | Christopher McCulloch | Suffers a heart attack and dies after complaining of all the obituaries in the paper. | |
| Voodoo Inmate | Ghosts | Reggie Watts | Confirms that Superjail is haunted. | |
| Undead Inmate#1 | Ghosts | Christopher McCulloch | Realizes that the Warden is responsible for all the souls floating around Limbo. | |
| Undead Inmate#2 | Ghosts | ??? | Becomes angered that the Warden caused them all to die. | |
| Jailboat Guard | Vacation | Christopher McCulloch | Left in charge of watching over the captive Warden by Lord Stingray. Is killed by the Doctor. |
Season 3[]
| Name | First Appearance | Voice Actor | Description | Image |
|---|---|---|---|---|
| Poker Buddy | Stingstress | Christopher McCulloch | An unnamed inmate seen playing poker with Lord Stingray. Winds up killed by Bruce and Nova. | |
| Audience Member | Uh Oh, It's Magic | ??? | Mocks the Warden's ventriloquist dummy. | |
| Showering Inmate | Sticky Discharge | Christopher McCulloch | Seen asking Paul what he plans to do when paroled. | |
| Charlie Streyt | Sticky Discharge | Christopher McCulloch | Jean's temporary new cellmate. | |
| Wrestling Inmate#1 | Special Needs | ??? | Berates Alice for her brutality. | |
| Wrestling Inmate#2 | Special Needs | ??? | Joins in on criticizing Alice, for her maiming of Warden. | |
| Singing Inmate | Special Needs | ??? | Missing the lower half of his jaw. Is seen singing "Amazing Grace". | |
| Leader of disfigured inmates | Special Needs | Tunde Adebimpe | Missing his arms, fights with legs. | |
| Bagpipe | Special Needs | Christopher McCulloch | Has pipes lodged through his body. | |
| Guns | Sticky Discharge (early cameo), Special Needs | ??? | Has shrunken legs and muscular arms, and confined to a wheelchair. Makes a cameo in "The Trouble with Triples". | |
| Slim | Sticky Discharge (early cameo), Special Needs | Christopher McCulloch | Split in half vertically. Appeared with a different design in his "Sticky Discharge" cameo. | |
| Garbage Bag Inmate | Sticky Discharge (early cameo), Special Needs | Christopher McCulloch | Exists as a disembodied head with his vital organs sealed inside of a garbage bag that he uses to crawl around in. | |
| Lowbrow | Special Needs | ??? | An inmate with his head squished down. | |
| Limbless Inmate | Special Needs | ??? | An inmate reduced to a limbless torso. | |
| Tally-Mark Tattoo Inmate | Special Needs | Christopher McCulloch | Winds up killed from one of the Warden's handicap-accessible contraptions. | |
| Inmate with White Mustache | Special Needs | ??? | The second to die from one of the contraptions. | |
| Obsessed Jailpup Fan | Planet Radio | ??? | A convict that kills his cellmate for not taking the "Jailpup" show seriously enough. | |
| Cellmate | Planet Radio | ??? | The apathetic cellmate. | |
| Shiv Inmate | Burn Stoolie Burn | ??? | Argues that the proper name for a prison knife is a "shiv". | |
| Shank Inmate | Burn Stoolie Burn | ??? | Argues that the proper term is a "shank". | |
| "Pappy" | Burn Stoolie Burn | ??? (grunts) | An inmate that dies from attempting to open the Warden's safe. |