Longest Running TV Sitcom by Episodes
The sitcom with the most episodes is generally considered to be "It's Always Sunny in Philadelphia," which began airing in 2005 and has produced hundreds of episodes across many seasons. It is known for its long continuous run on basic cable.
Longest Running Network Sitcom by Seasons
"The Adventures of Ozzie and Harriet" is often cited as the longest running traditional network sitcom by seasons, airing from 1952 to 1966. The show followed the fictional Nelson family and aired 14 seasons on ABC.
Other Long Running Sitcoms
Other long running sitcoms include "Modern Family," which aired on ABC from 2009 to 2020 and won multiple Emmy Awards, and "Frasier," which ran for 11 seasons. For more details on TV longevity records, see the Television Academy website.
When comparing sitcoms, definitions vary by source and format. Streaming series and cable shows can extend episode counts further than traditional network sitcoms of the past.
