Jerry Seinfeld is a semi-fictionalized version of the comedian of the same name. The television series Seinfeld focuses on the misadventures of Jerry, his best friend George Costanza, neighbor Cosmo Kramer and ex-girlfriend Elaine Benes. He is usually the voice of reason amid his friends' antics and the focal point of the relationship.
In contrast to the series' supporting characters, he rarely runs into major personal problems. Jerry is the only main character on the show to maintain the same career (a stand-up comedian, like the real Seinfeld) throughout the series. He is the most observational character, sarcastically commenting on his friends' quirky habits. Much of the show's action takes place in Jerry's apartment located in New York City at 129 West 81st Street, apartment 5A. He and his friends also frequently have coffee or meals together at Monk's Café.
Jerry appeared in all 180 episodes of Seinfeld (including several two-part episodes) and is the only character in the show to appear in every episode.