Clifford Barnes, played by Ken Kercheval, is a fictional character from the popular American television series Dallas. The Barnes family are competitors and sometimes enemies of the Ewing family. Cliff is the son of Willard "Digger" Barnes and Rebecca Barnes, the brother of Pamela Barnes Ewing, and half-brother of Katherine Wentworth. J.R. Ewing was Cliff's personal nemesis, with J.R. and Cliff continuing on the bitter feud that started with their fathers, Jock Ewing and Digger, from their oil wildcatting days during the Great Depression. J.R. and Cliff were the only two characters to appear throughout the entire run of the series. A running gag on the series is Cliff's fondness for Chinese take-out.

Kenneth Marine Kercheval was an American actor, best known for his role as Cliff Barnes on the television series Dallas and its 2012 revival.