The following is a list of the characters from the Ice Age films, mentioned by a name either presented in the films or in any other official material. Each character includes a summary when possible, the voice actor or actors associated with the character, and a description of the character along with any aliases, spouses and the character's species.

The Herd Manny

Manfred "Manny" is a woolly mammoth. His personality is shown to be aloof, grumpy, sarcastic and standoffish, but is otherwise loving and courageous. In the first film, while passing through the icy cave, the herd discovers cave paintings of Manny with his wife and son, who were killed by humans; this is a very sentimental moment for Manny, since he failed to protect them. Manny finds love with Ellie in Ice Age: The Meltdown. Because of the death of his family, in Ice Age: Dawn of the Dinosaurs, he is anxious when Ellie is pregnant.

At the end of the film, he becomes the proud father of a baby daughter named Peaches. In Ice Age: Continental Drift, he gets into an argument with his teenage daughter before being pulled away by the drift with Diego, Sid and Granny. He and the team later encounter a group of pirates led by Captain Gutt. When the team escaped they destroy the ship and take Shira with them. This enrages the Captain who hunts them down. Later on, he is almost manipulated by sirens.

Sid

Sidney "Sid" the Sloth is a ground sloth who is dull-witted, talkative, friendly, carefree, naive, accident-prone, patient and funny with a caring nature, while voiced with a lateral lisp. Sid once lived in a tree with other sloths that always wanted to leave Sid behind when the migration occurred, using several different ways to leave him behind. Sid's mother always told him that "bad news is just good news in disguise" before abandoning him for good.

He accidentally starts a fire in the first film and learns how to do it properly towards the end. He also shows this skill in the second film, where he is worshipped by a tribe of "mini-sloths" who call him the Fire King and try to sacrifice him. In the third film, he adopts a trio of baby T-Rexes, and is forcibly taken to the underground dinosaur land by their mother, requiring the others to come and save him.

In the behind the scenes, the creators combined the traits of three-toed sloths and ground sloths while designing Sid and the other sloth characters. Paleontologists have suggested that Sid most closely resembles Nothrotheriops shastensis among ground sloths.

In the first film the English version of Sid doesn't lisp. Otto Waalkes the German voice add the lisp to that version. The lisp was extremely successfully in Germany therefore all other languages, inclusive English since the second film, add the lisp to the character.

Diego

Diego is a Smilodon. He is Shira's love interest. He has a sardonic personality, although it is not intended to be nasty. He was sent by his pack to retrieve the human baby Roshan; when he found Roshan in Manny and Sid's care, he pretended to lead them to the humans, but instead planned to lead them into an ambush by the pack. When Manny saved his life, Diego had a change of heart, confessing about the pack and sacrifices himself to help them escape. He was left for dead when the pack's leader, Soto, wounded him in an attack meant for Manny but he survived and joined Manny and Sid on their travels.

In the second film, he was revealed to suffer from aquaphobia, but he eventually conquered it in order to save Sid, Crash and Eddie. In the third film, he began to fear that he was losing his predatory abilities from being in the "herd" too long, and considered staying in the underground dinosaur world with Buck. He changed his mind after managing to save the labored Ellie from a dinosaur attack. In Ice Age: Continental Drift, another Smilodon named Shira joins the group, and Diego feels attracted to her. During the end credits, Diego and Shira are seen nuzzling each other showing that they have now become a couple.

Ellie

Ellie is a female woolly mammoth, whom Manny, Diego, and Sid meet during their migration to escape the flood in the second movie, Ice Age: The Meltdown. She thinks she is a possum, as she was raised by Crash's and Eddie's mother when she was a calf, until she accepts the truth about what she really is, and joins the herd with her adoptive brothers.

In Ice Age: Dawn of the Dinosaurs, she and Manny are mates and Ellie is pregnant with their first child. When they find the Dinosaur World under their feet, they have to go in and search for Sid in Lava Falls. Despite being pregnant, she bravely went on the journey, and at one point had to save her mate and friends when they were trapped in the chasm of death. When very close to Lava Falls, Ellie goes into labour, and, with Diego's help, gives birth to a healthy female calf. She comes up with the name Peaches (who was named after the codeword that was used if Ellie went into labor on the trip) and Manny happily agrees. When they reunite with Sid and return to the surface, Ellie introduces Peaches to the herd's new home.

In Ice Age: Continental Drift, she is an understanding wife and mother. Unlike her husband, Ellie recognises that her daughter is growing up and supports both Manny and Peaches when they argue. When the continental breakup happens she leads an evacuation route to the Land Bridge. She is briefly held hostage by the evil Captain Gutt and his pirate crew but is rescued by her family and she fights the pirates alongside them.

Crash and Eddie

Crash and Eddie are two twin brother opossums. Adoptive brothers of Ellie, they cared for her and taught her to hang by her tail from a tree branch when she slept, as they did. They are shown to be adventurous and fun-loving, courtesy of the fact that they're both very stupid. Though they are around the same age as Ellie, they are not nearly as mature.

In the third film, Crash and Eddie travel with the others to the dino jungle to save Sid from Momma, and both grow to idolize Buck, the one-eyed dinosaur-hunting weasel who helped them find Sid. They also mention they never liked Sid. This is not true however (as they were at the time being affected by the gas within the "Chasm of Death"), due to helping Buck save Sid from his incoming death. Crash and Eddie, along with Buck, ride a pterosaur and save Sid from a lava flow heading downwards.

In Ice Age: Continental Drift, they have more minor roles than in the previous films but do partake in the final battle with Gutt's crew fighting Dobson by hopping on his back and having a rodeo, but accidentally let him charge into Manny and, later Shira, knocking them onto the other ship.

Peaches

Peaches is the daughter of Manny and Ellie, born in the Dinosaurs' world whilst they were under attack by a pack of Guanlong. She appeared close to end of Ice Age: Dawn of the Dinosaurs. At the end of the film, she returned to the surface with her parents and the rest of the group. She is voiced by Ciara Bravo in Ice Age: A Mammoth Christmas as a kid, and Keke Palmer in Ice Age: Continental Drift as a teenager, and also as a young adult in Ice Age: Collision Course.

Peaches appears as a teenager in Ice Age: Continental Drift. She is self-taught to do some possum moves just like her mother. In Ice Age: Collision Course, Peaches is now a young adult and prepares to marry a male mammoth named Julian.

She does not appear in The Ice Age Adventures of Buck Wild nor is she ever mentioned despite the film being set after Dawn of the Dinosaurs.

Granny

Gladys "Granny" is Sid's grandmother. She joins the herd after her own family abandons her. She had an allegedly imaginary pet named Precious, which showed up at the end and turned out to be real: a giant whale who defeats Gutt's crew (minus Squint) by blasting them away.

In Ice Age: Continental Drift, Precious helped the group to Switchback Cove and Granny bids her pet a fond good-bye.

Louis

Louis appears in Ice Age: Continental Drift as Peaches' best friend. He is a timid, well-spoken and cute molehog (a portmanteau of mole and hedgehog). He is shown to have a crush on Peaches.

Louis makes a small cameo in Ice Age: Collision Course.

Shira

Shira appears in Ice Age: Continental Drift as part of Captain Gutt's crew and is initially his pawn. She is a dazzlingly beautiful female Smilodon resembling a white tiger and Diego's lover. She makes her first appearance in Scrat's Continental Crack-up: Part 2 standing next to Captain Gutt, who is holding Scrat. It is additionally mentioned that (much like Diego) Shira left her pack to join Gutt's crew. Over the course of the film, however, Shira ultimately chooses to leave Gutt's crew and join the Herd at Diego's side.

In Ice Age: Collision Course, she is now married to Diego and wants to start a family with him.

Julian

Julian is a young and courageous mammoth who is Peaches' fiancé and part-time member of The Herd and The Brat Pack. Julian may be somewhat absent-minded, but is devoted and caring toward Peaches, and wants to be part of her family.

Brooke

Brooke is a British ground sloth living in Geotopia who becomes Sid's love interest and new girlfriend. She appears in Ice Age: Collision Course.

It is not known what becomes of the relationship after her appearance in the film, as she is neither seen nor mentioned in The Ice Age Adventures of Buck Wild.

Scrat

Scrat is a squirrel in the first five of Ice Age films who is obsessed with collecting acorns, constantly putting his life in danger to obtain and defend them. He has his own stories in the films which are mostly independent of those of the main characters, though the two do intersect at times.

Appearing in Ice Age Roshan

Roshan, or "Pinky" as Manny called him, is the human baby that Manny, Sid, and Diego return to his father.

He is the young son of a human tribal chief. While sleeping one morning, his tribe is attacked by a pack of smilodons. The leader of the pack, Soto, wants to kill the baby as revenge for the baby's father killing half the pack and using their skin for clothes and their flesh for food. His mother is able to fend off Diego, whose mission is to retrieve him. However, she is cornered over a waterfall.

In a desperate attempt to save her son, the mother leaps over the waterfall, holding the baby tightly in her arms. They are both found by Manny and Sid at the riverside. Using what little strength she has left, she gives the baby to Manny and Sid in hopes that he will be safe with them.

Soto's Pack Soto's Pack are a group of saber-toothed cats in Ice Age. They targeted Roshan as revenge on his tribe because half of their pack was killed by them and used to make their clothes. Diego was formerly of this group before he defected to Manny and Sid's side.

Soto

Soto is a violent and sadistic Smilodon who is the leader of a pack of saber-toothed cats. He wants to eat Roshan in vengeance for the murders of several of his pack-mates.

As part of his plan to kidnap Roshan, Soto plans an attack on the human camp so that while he and three other pack members would attack the humans, Diego would sneak in, unnoticed, and abduct Roshan. Diego fails at this task, leaving Soto furious, telling Diego to bring Roshan to Half-Peak where he would meet with the others and threatens have him served as a replacement if he fails. Soto dispatched his fellow pack members Zeke and Oscar to warn Diego to hurry and bring Roshan or not return at all, though was reciprocated with the news that alongside Roshan, Soto would receive a mammoth. During the final battle, Soto was sent flying into the side of a cliff where he was killed offscreen by the falling icicles.

Zeke

Zeke is an overactive Smilodon and a member of Soto's pack.