John Adams appeared in the Season Seven episode, "I'm a Little Bit Country", where he was seen during Eric Cartman's flashback. He was the second President of the United States as well as the first Vice-President and was a member of the Continental Congress in 1776.
He appears in a brown dress coat, brown trousers and white shirt. He had white hair. Like many of the characters seen in Cartman's flashback, he was not drawn with normal South Park facial features, instead having realistic facial proportions.