Abraham Lincoln's first appearance, as a character, was in "The List". However, he has been mentioned as well as seen in photographs many times previously.
Abraham Lincoln wears can be seen wearing a black top hat, a white, button-up undershirt, a black suit, gray pants, and a black bow-tie. He has a gray beard and an overall "wrinkly" appearance.
He appears to children in need of motivation, he appeared to Kyle in "The List", trying to convince him that being ugly is a good thing, and he then tries to motivate Kyle to work, and not burn down the school, hinting at a particular excess of compassion. With these facts, we can assume he is, morally, a good person. While originally maintaining this calm and compassionate demeanor, he was quick to call Kyle a "fucking asshole" when Kyle refused to listen to his advice. With these facts, we can assume Abraham Lincoln is a compassionate, but angrily controlling, person.
He was shown to care about Kyle's wellbeing in "The List", trying to convince him that being ugly was a good thing because he wouldn't be handed things, and therefore, would have to work, which would allow Kyle to excel in life. Their acquaintanceship fell apart when Kyle refused to take his advice, culminating in Abraham calling Kyle a "fucking asshole" and then driving off.
- Abraham Lincoln: "Well then, you're just a fucking asshole!" from "The List"
- Abraham Lincoln: "It was only when she reached age forty, and her looks started to fade, that she realized she was really about as interesting and special as a wet carrot." from "The List".
- Throughout the series in the Cartman household, an image of Cartman and his mom in front of Mount Rushmore, is seen. Lincoln is among the faces.
- Lincoln was first referenced in "The Red Badge of Gayness", where Kyle dresses as Abraham Lincoln in order to put an end to the Civil War re-enactment.
- In the episode, "Super Best Friends", David Blaine animated the Lincoln Memorial and ordered it to destroy the Super Best Friends. The statue was ultimately killed by a statue of John Wilkes Booth.
- In "Wing", Cartman "receives" a fake phone call from Abraham Lincoln, completely unaware, to Kyle's annoyance, that Lincoln is dead.
- "The Red Badge of Gayness" - Kyle Broflovski dresses up as him.
- "Super Best Friends" - Seen as a statue brought to life by David Blaine.
- "The List" - Seen as a ghost to mentor Kyle. So far his only appearance as a character.