This is a list of the longest running American cable television series, ordered by number of broadcast seasons.
To qualify for this list, the programming must originate in North America and shown nationally in the United States 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 will be excluded, along with hybrid broadcast/cable networks such as The WB 100+/The CW Plus. For series that originated on American broadcast networks (or broadcast syndication) and then was picked up by a national cable network, only the amount aired nationally on cable as original programming is represented here.
A season for the purpose of this article is defined as a given year, not a production cycle (as in America's Next Top Model) which is defined as a season by the network or by the program's distributor; for instance, multiple series on Food Network (e.g. Chopped) count each production cycle as a season rather than classing them by year.