The longest running cartoon on television has to be The Simpsons. They started out in the year 1987 and it is still going strong right now. It already has so many seasons and people still want more. Who cares if the characters never age? What matters to people is that they are always entertained with the various antics of the show.
Take note that aside from The Simpsons, there are also other series that are known to be notable such as The Rugrats, South Park, Family Guy, and so much more. It seems that a lot of people are fond of cartoons, right? There are also some cartoons that people re-watch from time to time.