Regular characters
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- Frank Rizzo – an extremely abrasive, foul-mouthed blue-collar Italian-American New Yorker with bizarre complaints and requests (voiced by Johnny Brennan). Frank curses repeatedly at a potential employer during an inquiry about a job, and accuses the Mickey Mouse character at Disney World of being sexually inappropriate with his children.
- Sol Rosenberg – a frail, insecure, New York Jew who suffers from various, and often comical problems and ailments. Somewhat childish in his demeanor, Sol seeks treatment for problems ranging from genital warts to a fear of his own shadow (voiced by Johnny Brennan).
- Tarbash, the Egyptian Magician – a Middle Eastern man with a repertoire of dangerous stage tricks who mutilates himself or is attacked by various wild animals used in his act. His last appearance in the Jerky Boys albums was in The Jerky Tapes (voiced by Kamal).
- Ali Kamal – a Middle Eastern cab driver victimized by a sadistic dentist. Assaulted and possibly molested, Ali seeks the aid of a lawyer specializing in "dental malpractice." On another occasion, Kamal seeks the assistance of an attorney after being brutally beaten by a tenant for delivering pizza to an incorrect address (voiced by Kamal).
- Jack Tor s – a flamboyantly homosexual man who frequently takes part in bizarre sexual activities and is looking for assistance or supplies related to this. Also a musician, catwalk model, casting director and a dancer (voiced by Johnny Brennan). In a running gag, when asked to spell his surname, the character would reply: "T-o-r... ... ... s".
- Frank Kissel – an aged World War II veteran and ex-singer who uses a wheelchair. The character normally refers to himself only as Kissel. He sometimes complains about or is heard arguing with his wife. Kamal, who voices the character, appeared in full old-man makeup as Kissel in the Insane Clown Posse movie Big Money Hustlas .
- Jocko Johnson – voice and behavior similar to Frank Rizzo; wanted his wife's house demolished while she was out of town, as punishment for her infidelity. ("The Home Wrecker" track from The Jerky Boys album) (voiced by Kamal).
- Curly G., Cradle Rock – a throwback rap artist trying to catch a break; appeared on one track to date ("Bamm!" from The Jerky Boys 3 album) (voiced by Kamal Ahmed).
Other minor characters include:
- Big Ole Badass Bob The Cattle Rustler – an American Westerner/Texan who drives a semi-truck; has appeared on "Lawnmower Sale" and "Bad Ass Massage", both from The Jerky Boys 3 album, "Flower Lady #4" from The Jerky Tapes album, and is a featured character on Sol's Rusty Trombone (voiced by Johnny Brennan).
- Sammy Cox – older man with a pronounced lisp; appeared on one track to date ("Herman" from The Jerky Boys 4 album) (voiced by Johnny Brennan).
- Mike Derucki – an out-of-work painter (voiced by Brennan). Has appeared on several tracks including "Hello Ray" and "Dead Pet Removal".
- Harry Getzov – A name from the "Flower Lady" and "Moonlight Matinee" tracks from The Jerky Tapes album. The character is perennially away from the telephone, and unable to be reached by the unsuspecting caller who is pranked by either Jack Tors (Brennan), Tarbash (Kamal), or Big Ole Badass Bob The Cattle Rustler (Johnny Brennan). In the Jerky Boys CDs, Getzov is credited as the Jerky Boys manager.
- Jake – handles in-coming calls for Mr. Silverman, the phony sports agent ("Silverman baby" track from (The Jerky Tapes) and "Big Hock" track from the Stop Staring at Me! album) (voiced by Johnny Brennan).
- Jake – a truck driver with a penchant for speed and stunts from the track "Hot Rod Mover" (from The Jerky Boys album) (voiced by Johnny Brennan).
- Anthony Kissel – Frank Kissel's son; appeared on two tracks to date ("Uncle Freddie" from The Jerky Boys' album, and "Laundromat" from The Jerky Boys 4 album). Anthony is also mentioned in "Husband Beating" (from The Jerky Boys 2 album), where Kissel said "I got a couple children, they're a little older right now", but he did not mention his real name (voiced by Brennan).
- Martha Kissel – Frank Kissel's wife; often appears with Kissel. Her voice can be heard in calls such as "Uncle Freddie", "Husband Beating" and "Kissel Sails". On "Uncle Freddie" (from The Jerky Boys album), Kissel reveals his wife's name before he begins arguing with the person who answered the phone about whether Uncle Freddie had died (voiced by Johnny Brennan).
- Nikos – an immigrant Greek delicatessen owner; appeared on one track to date. Nikos often mumbles incoherently, interspersing a few real Greek words within all his gibberish ("Bad Tomatoes" from The Jerky Boys 3 album) (voiced by Johnny Brennan).
- Pico – an abused Mexican immigrant; often hired as Kissel's personal assistant, which invariably has disastrous consequences. When Kissel hires Pico to repair a broken television, the pair end up getting electrocuted. (voiced by Johnny Brennan)
- Paul Rizzo – a car salesman in upstate New York who uses violent techniques to close sales, including choking and threatening customers. Paul appears on only the "Car Salesman" track (from The Jerky Boys album), and is voiced by Johnny Brennan. The character's demeanor and voice are identical to those of Frank Rizzo. The name "Paul" is a result of Brennan mistakenly answering his name as "Paul" instead of Frank when he was trying to remember that he was speaking to someone named Paul.
- Rosine – a flamboyant, flirtatious, Puerto Rican transvestite [9] who plays the flute and aspires to learn sign language. Rosine has a variety of bizarre interests and enjoys slapping herself for sexual gratification. (voiced by Johnny Brennan)
- Silverman – a phony sports agent who convinces an unsuspecting young man that he can earn a job playing baseball for the New York Yankees. ("Silverman Baby!!" track from The Jerky Tapes album) (voiced by Johnny Brennan).
- Brett Weir – name of Johnny Brennan's brother-in-law, [6] mentioned in "Super Across The Way" (from The Jerky Boys album) and "The Gay Model". A character with the same name, portrayed by actor James Lorinz, also appeared in 1995's The Jerky Boys: The Movie .
