How many seasons of Seinfeld were broadcast?

Seinfeld was broadcast for nine seasons.

The sitcom premiered on NBC on July 5, 1989, and its ninth and final season ended on May 14, 1998. Across those nine seasons, the series produced 180 episodes, following Jerry Seinfeld’s fictionalized daily life and his friends George Costanza, Elaine Benes, and Cosmo Kramer.

The season count can be confusing because the show’s early run was unusually short. Season one contained only five episodes, while later seasons generally had much larger orders. The series also included hour-long or two-part installments and retrospective specials, so episode counts do not map neatly onto a simple nine-episode-per-season pattern.

Seinfeld could have continued: NBC reportedly offered Jerry Seinfeld a substantial deal for a tenth season, but he chose to end the show after season nine. The final season therefore was not a cancellation caused by a sudden ratings collapse; it was the planned conclusion of a hugely successful run. The finale aired on May 14, 1998, and the complete series remains organized into nine seasons in episode guides and home-video releases.