Hank Hill and family will be seen in their last new episode in an hour-long series finale on September 13, 2009.
August 10, 2009
Fox has announced that King of the Hill will get a proper send-off after 13 seasons on the air. The animated series from creator Mike Judge will air its hour-long series finale on Sunday, September 13, 2009 at 8:00pm ET/PT.
(Source: TV by the Numbers)