Fox has decided to end the run of King of the Hill after this season's thirteen episodes are up and won't renew it, according to the Hollywood Reporter (tip o' the hat to Andrea for the link):
After several previous brushes with cancellation, the network has opted not to renew the series beyond its current 13th season.
In April, Fox picked up 13 more episodes from the 20th Century Fox TV-produced show, which are wrapping production.
A lot has changed since "King of the Hill" premiered in 1997. Its creators Greg Daniels and Mike Judge have moved on to other projects -- Daniels developed and is running NBC's "The Office," and Judge has a new animated series, "The Goode Family," launching on ABC in midseason.
Our Renew or Cancel Index can't predict all circumstances and this was one of them. While Hill was getting long in tooth, from an 18-49 demographic perspective it was outperforming other Fox shows -- even shows the Index predicts would be renewed like Bones and American Dad. It's been a busy day for Fox which earlier in the day announced it was pulling 'Til Death from its schedule. The Index did predict that move.