- Seinfeld
- Official site features show and star information, audio and video clips, pictures, live chat and online store from Columbia TriStar. - IMDb: Seinfeld - Cast information, plot summaries, writing credits, and message board.
- Kenny Kramer - Home of the "Real Kramer," inspiration for Cosmo. Generally a sales pitch for his Reality Tour.
- MovieProp.com - Seinfeld - Episode guide, biographies, movie references, and information about reoccurring characters. Site also features information about the real J Peterman, Elaine's boyfriends, Jerry's girlfriends, Jerry's fixation on Superman, as well as essays.
- Seinaholic - Schedule, icons, episode guide, pictures, sounds, cast biographies, trivia, and links.
- Seinfeld - Character details, poll, quiz, and message board.
- Seinfeld Blog - Includes episode videos, photos, scripts, links, and a forum.
- Seinfeldfan - Video, screen savers, icons, episode guide, biographies, scripts, quotes, trivia, forum, newsletter, guestbook, and links.
- Seinology - Video, audio, episode guide, lists, message board, chat, and links.
- TBS Superstation - Seinfeld - The story, cast, TBS episode schedule, favorite clips, photos, and daily trivia.
- Totally Seinfilled - Pictures, sounds, scripts, movies, character information and trivia.
- World of Seinfeld - Features a list of episodes, cast biographies, show history, and a forum.
- Yahoo Groups: Seinfeld Preservation Society - Email discussion list for fans of the show.
