Seinfeld produced 180 episodes when the halves of its one-hour episodes are counted separately.
The sitcom ran for nine seasons, from 1989 to 1998, and its standard episode count is 180. That total uses a television-listing convention: several hour-long installments are treated as two episodes because each half has its own story structure and episode placement. The count also includes the two-part retrospective episodes that preceded the finale.
This is why different sources can appear to disagree. Counting the three hour-long story episodes as single installments produces a lower total, commonly given as 177 for the regular narrative episodes, while some databases use other cataloguing rules. Trivia questions that explicitly say to count both halves are using the established 180-episode listing.
The finale, “The Finale,” aired on May 14, 1998. It was presented as a one-hour event but is split into two listed episodes, reinforcing why the wording of the question matters. Seinfeld’s nine-season run remains one of television’s best-known sitcom records.