List of longest-running U.S. broadcast network television series Wikipedia
This is a list of the longest running U.S. broadcast network television series, ordered by number of broadcast seasons.
To qualify for this list, the programming must originate in North America, be shown on a United States national (not regional) television network, and be first-run (as opposed to a repackaging of previously-aired material or material released in other media). For the purposes of this list, series that were available only on a local or regional basis are excluded. The "number of seasons" total does not include cable broadcasts or series in syndication.