This is a list of the longest-running United States television series, ordered by number of years the show has been aired. This list includes only first-run series originating in North America and available throughout the U.S. via national broadcast networks, U.S. cable networks, or syndication. Series continuations (with name changes and/or changes in network) are noted, but series' revivals are treated as separate from the originals (see The People's Court and Jeopardy!). Series broadcast within the US but produced in other countries, such as Coronation Street (50+ years) and Doctor Who are not included.