Jerome "Jerry" Seinfeld is the main protagonist on the United States television sitcom Seinfeld (1989–1998). This semi-fictionalized version of comedian Jerry Seinfeld was named after, based on, and played by Seinfeld himself.

The series revolves around Jerry's misadventures with his best friend George Costanza, neighbor Cosmo Kramer, and ex-girlfriend Elaine Benes. He is usually the voice of reason amidst his friends' antics and the focal point of the foursome's relationship. An eternal optimist, 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 at 129 West 81st Street, apartment 5A, as stated in the episode "The Alternate Side". He and his friends also frequently appear