In earlier drafts, the deceased Riveras were cursed in the Land of the Dead to sing strangely whenever they open their mouths as a result of hating music in their lifetime. They originally saw Hector's guitar as a source of their curse. They were originally more relentless as they would go to great lengths to pursue Miguel in order to break Hector's guitar in order to break that curse. When the film was originally to be a musical like Disney's style, the Riveras would originally perform a pointless musical number to educate Miguel on dia de los muertos which contradicts their nature as a music-hating family.
A tightly-knit group, the Riveras are humble people who collectively run the presented from Mamá Coco line. Unfortunately, they are known in their home as being the only family who despise music in an otherwise musical town, due to a family tiff that happened between the family's former matriarch some of th and her husband ursuing mu. Since then, the family has only grown and still carries the taboo on music with a passion. Nowadays, Elena (currently known as |thumb|300px]] Felipe Riv) is the unofficial head of the Rivera clan.
In the present day, Miguel Rivera reveals to the family that Héctor did not intend to leave Imelda but was murdered before he could return to her. With the evidence presented from Mamá Coco, the family forgives Héctor and lift their ban towards music. As a result, Héctor's reputation is restored and the undead Rivera members reaccept him into their clan. Because of Miguel's actions, some of the Riveras start pursuing music themselves.
- Main article: Imelda
- Main article: Héctor
Felipe Rivera and Óscar Rivera (Herbert Siguenza), also known as Tío Felipe and Tío Óscar, were the younger twin brothers of Imelda and are Miguel's great-great-great-uncles. They were very close to each other, to the point they finished each other's sentences. During the battle against Ernesto's security, Felipe uses his brother's arms as nunchucks whilst Oscar headbutts his opponents.
- Main article: Mamá Coco
Julio (Alfonso Arau), also known as Papá Julio, was the husband of Mamá Coco, and the father of Elena and Victoria. He gets very frantic easily, but he has his family's best interests at heart. Due to her advancing age, Coco tends to mistake her great-grandson Miguel for Julio. Despite being the shortest and easily unnerved member of the family, he is brave when it counts as he was the first to charge into battle against Ernesto's security guards despite being at least a head shorter than them.
Rosita (Selene Luna), also known as Tía Rosita, was the sister of Julio. She has a hefty build, and loves to give hugs, marking her out as a very sweet and caring woman. She wears pink flowers in her hair, which may or may not be a wig since she hides her face behind her hair when Miguel asks her for her blessing. She and Victoria are often seen together despite being opposites and are the ones who expose Ernesto to the Land of the Dead, Rosita positioning the camera to catch him in the act.
- Main article: Abuelita (Coco)
Victoria (Dyana Ortellí) , also known as Tía Victoria, was the eldest daughter of Julio and Coco, and the sister of Elena. She is one of the taller members of the family and is very composed and severe, in contrast to the more outgoing Rosita. She is the first to realise that Miguel is not quite dead and also deduces that he must have something to do with Imelda being unable to cross over. When Miguel asks her for her blessing, in contrast to her other family's terrified reactions she simply shakes her head. Along with Rosita, she is shocked when Imelda starts singing on stage and helps to expose Ernesto by switching on a nearby camera which records his confession.
Franco Rivera (Roberto Donati) is the husband of Abuelita, and the father of Berto, Gloria, and Enrique. Unlike his wife, Franco is relaxing and calm; he is the one who can keep Abuelita's temper in check.
Gloria Rivera (Carla Medina), also known as Tía Gloria, is the only daughter of Franco and Abuelita and the sister of Berto and Enrique Rivera. Unlike her brothers, Gloria never married or had children. However, she is still very close with her family.
- Main article: Enrique Rivera
- Main article: Luisa Rivera
- Main article: Miguel Rivera
Socorro Rivera is the second child of Enrique and Luisa, and the younger sister of Miguel. She was born some time after the death of Mamá Coco, so she was named in honor of her paternal great-grandmother.
Berto Rivera (Luis Valdez), also known as Tío Berto, is the first son of Franco and Abuelita, and the brother of Gloria and Enrique. He is also the husband of Carmen, and the father of Abel, Rosa, Benny and Manny.
Carmen Rivera, also known as Tía Carmen, is the wife of Berto, and the mother of Abel, Rosa, Benny and Manny.
Abel Rivera (Polo Rojas), also known as Primo Abel, is the oldest son of Berto and Carmen. He is 19 years old. Although he is the tallest among the current Riveras and the oldest among their latest generation, Abel has a goofy, humorous demeanor and enjoys fútbol (soccer). He is a good shoemaker, but his tendency to get easily distracted means his shoes often get stuck in the ceiling when buffing them.
At the end of the film, he learns to play the accordion.
Rosa Rivera (Montse Hernandez), also known as Prima Rosa is the only daughter of Berto and Carmen, the younger sister of Abel, and the older sister of Benny and Manny. She is around 13 or 14 years old. Rosa is an adventurous girl, and acts stern towards her little brothers and cousins (including Miguel).
At the end of the film, she learns to play the violin.
Benny and Manny are the twins sons of Berto and Carmen, and the younger brothers of Abel and Rosa. Before Socorro's birth, they were the youngest members of the Rivera family.