The following is a list of characters from the series Mr. Pickles (2013–2019) and its spin-off sequel series Momma Named Me Sheriff (2019–2021)..

Main characters Mr. Pickles Mr. Pickles (voiced by Dave Stewart in "Season 3 Finale") is the titular protagonist and the Goodman family's pet Border Collie, revealed in the Season 3 finale to be descended from a long bloodline of dogs that are physical embodiment of a Devil that ruled over an ancient island nation that previously sacrificed any living dogs. Through reasons unknown, Mr. Pickles ended up in Old Town and living with the Goodman family - named by Tommy for his love of eating pickles. He also enjoys mutilating, killing and engaging in sexual debauchery with those who pose a threat to Tommy or other antagonists. Mr. Pickles is highly intelligent and possesses incredible strength, surgical skills that he uses to mutilate his victims, the ability to steal from an evil scientist, a high-tech android, and demonic powers which allow him to control local animals to do his bidding (it is shown in one episode of Season 3 that he can't control snakes due to them having no ears to hear his demonic commands but learns to control them through vibrations). Despite his evil ways, he loves and is extremely protective of the impressionable young Tommy and his family: protecting them from danger, and often killing those who might do them harm, such as murdering a group of sexual predators or turning an unlicensed breast surgeon who gave Tommy breast implants into a multiple-breasted freak. He has a long-standing feud with Henry Gobbleblobber, the only Goodman family member aware of Mr. Pickles' evil nature. While Mr. Pickles does not actually harm Henry, the dog does put the old man in humiliating situations while making him seem crazy to everyone else. Despite their adversarial nature, Mr. Pickles has saved Henry from being lobotomized while he was committed to an asylum and a cannibalistic serial killer that Henry had befriended, unaware he was an escaped convict and serial killer. Mr. Pickles has also shown to be sexually attracted to Tommy's mother by often groping, touching her private areas, and even playfully dry-humping her.

Mr. Pickles' doghouse leads to a hidden, underground lair that's filled with blood, pentagrams, victims – both living slaves and dead, mutilated bodies – and a throne where he usually eats his pickles. Many of the series' one-time characters usually end up in his lair where they are either killed or kept as prisoners. Henry is the only person shown to be able to enter Mr. Pickles' lair and survive repeatedly as nobody believes him due to his tales. He is responsible for turning Henry's wife Agnes into Steve, which is implied to have been due to her promising to do anything he wanted her to. Mr. Pickles and Agnes work together to stop Henry from revealing the truth by having Agnes pretend she has amnesia, but their plan hits a snag when Henry takes her to a memory download service which is actually a blackmailing scam run by a group of hackers. Agnes angers Mr. Pickles when she almost blows everything while being confronted by her daughter and Henry over her failed attempt to seduce Stanley into having an affair which had been revealed by Tommy. She is killed by a passing truck but Mr. Pickles revives her and sends her on one last mission to destroy the satellite which contains a backup file of her memories. Though it is implied that Agnes became Steve because Mr. Pickles threatened to kill her, Mr. Pickles sheds a tear as he shoots Steve into space, indicating that he did come to care for her.

He also works well with Beverly when Stanley and his coworkers are kidnapped and ends up saving her, Stanley, and his coworkers from their captors showing that he is just as protective of Tommy's parents. In the Season 3 Finale, Mr. Pickles chases Henry down to his cabin after he moves away, intending to lessen his credibility further by making it seem he can talk via a speaker for one of his spare Steves to speak through. But Mr. Pickles decides to frame Henry for mass murder instead after the old man attempted to kill him, with Henry escaping the Sheriff and finding Mr. Pickles's ancestral home where he and one of Mr. Pickles's servant conduct a scheme to kill him. Though Mr. Pickles appeared to outwit and seemingly killed Henry by switching bodies with the owner of a show dog he was making love with, he ends up being killed for real as Henry used the same spell to switch bodies with Mr. Pickles's servant and then the show dog. However, the show dog gives birth to a female puppy that Tommy names "Mrs. Pickles".

Tommy Goodman Tommy Goodman (voiced by Kaitlyn Robrock) is the Goodman family's physically disabled and dimwitted young son. He is 6-year-old, wears leg-braces and a bowl cut, and considers Mr. Pickles as his best friend, often feeding him pickles whenever he behaves. Tommy is often protected by Mr. Pickles and is protective of Mr. Pickles as well, such as when he took it upon himself to search for Mr. Pickles after he was kidnapped by mercenaries. Due to his idiocy and naïve personality, Tommy usually gets involved in dangerous situations and Mr. Pickles (at times frustrated) steps in to save him and dispose of the bad people involved. Like most characters on the show, Tommy is unaware of Mr. Pickles' evil nature. At one point in season two, Mr. Pickles spends most of the episode away from Tommy; this results in Tommy getting involved in a series of accidents, causing him to scorn Mr. Pickles and not give him a pickle. However, in Season 3's opening, he returns to his friendly nature after finding his grandmother Agnes. Agnes, however, shows contempt for Tommy, calling him a stupid boy even while pretending to be amnesiac.

Stanley Goodman Stanley Goodman (voiced by Jay Johnston) is Tommy's father who works as a telemarketer. Stanley is constantly bullied by his boss. As a result, Stanley hardly has time to spend with his family, especially his son. Nevertheless, Stanley means well and is committed to his family. Though they don't interact much, Mr. Pickles seems to respect him to a degree. He even showed displeasure when it looked as though a doctor was about to bring Stanley harm. In the opening of Season 3, it is revealed that he once laid naked with his mother-in-law Agnes, which is revealed by Tommy when he had all the town's memories uploaded into his mind. However, Agnes reveals that he refused to have sex with her when she tried to seduce him.

In Momma Named Me Sheriff, he quits his job as a telemarketer and became deputy where he works under the Sheriff.

Beverly Goodman Beverly Goodman (voiced by Brooke Shields) is Tommy's stay-at-home mother who is the traditional dutiful mother and wife. Beverly is oblivious of Mr. Pickles' evil nature and dismisses the dog's sexual behavior, for instance groping and touching her, as simple dog mannerisms. Like her son, Beverly is very dimwitted and naïve and sometimes feels limited by her home life. Despite being the first person to dismiss her father's stories about Mr. Pickles, she is very close to him as he is one of the few people she can talk to. Near the end of the second season, she's shown to be very tired of her domestic duties and had a strained relationship with her mother, who prevented Beverley from following her dreams. In Season 3, she returns to her normal self after Agnes is found by Tommy unaware it was to prevent her father from revealing that Agnes was Steve. She hopes to reconnect with her mother despite believing she has amnesia. When it is revealed that Agnes had lied naked next to her husband, she is angered at Stanley and her mother, though Agnes reveals in anger that Stanley refused her attempts to seduce him before she is killed by a passing truck. However Agnes' death seems to give her some closure thanks to the knowledge that Stanley chose to remain faithful to her and their marriage. She and Stanley decide to tell Tommy that his grandmother is in a better place as he is unaware of her death. In Season 3, she is shown to be more assertive and capable, even working together with Mr. Pickles to rescue her husband when he is kidnapped together with his coworkers by an insane telemarketer-hating plantation owner. She is also capable of constructing a motorcycle from household items and even fight off a motorcycle gang all by herself. However, she has a habit of damaging her husband's trunk every time she drives even when she does not drive the truck itself, as she ends up damaging it with her makeshift motorcycle after it is hit by a bowling ball thrown by the Sheriff. However, she retains her kind-hearted personality when she refuses to punish Tommy's bullies physically as she doesn't condone corporal punishment or violence against children.

Henry Gobbleblobber Henry Gobbleblobber (voiced by Frank Collison) is Tommy's grandfather and Beverly Goodman's father, referred to by everyone as "Grandpa Goodman" (despite the fact that he is really Beverly's father, while he and Stanley are in-laws). He is the only family member aware of Mr. Pickles' evil ways and has borne witness to the dog's several murders and other depraved acts. However, most of his family and the town Sheriff dismiss his attempts to expose the dog as just another of one of his "evil Mr. Pickles stories" and sometimes the Sheriff arrests him instead. Henry views Mr. Pickles as a monster though he understands that he and Mr. Pickles both care for Tommy's safety. Henry also suffers harassment from Mr. Pickles, though he briefly got peace from the dog during his brief fear of vacuum cleaners.

At the end of Season 1 and the start of Season 2, Henry attempts to expose Mr. Pickles by video-taping the inside of Mr. Pickles' doghouse to show to the Sheriff before learning he was one of Mr. Pickles' many high-tech androids. Henry ends being committed to the Old Town asylum when he attacked the real sheriff, realizing Mr. Pickles can't touch him while learning too late that asylum's director wishes to lobotomize him. Mr. Pickles eventually manages to free Henry from the asylum, ironically saving him.

In the Season 2 finale and Season 3, Henry's attempt to find out about a strange coin associated with Mr. Pickles led to him learning that his wife Agnes, who is revealed to be Steve, is still alive and serves by Mr. Pickles' side. Henry threatens to expose them, but Mr. Pickles arranges Agnes to found while feigning amnesia, Henry takes her to a memory download service in an attempt to forcefully recover her memories before it backfired when the proprietor is revealed to be a blackmailing hacker. Following Agnes's death when she was run over by a truck after learning she lied naked with his son-in-law, Henry angrily tries to confront Mr. Pickles before finding her revived and made some peace with Agnes as she sacrifices herself to destroy the satellite containing the hacker's memory backups.