Warren Darrel Chisum (born July 4, 1938) is a conservative Republican former member of the Texas House of Representatives from the Panhandle city of Pampa, a community of some 20,000 people and the seat of Gray County, Texas.
His service began in January 1989.
A key lieutenant of former Speaker Tom Craddick, of Midland, Chisum chaired the budget-writing House Appropriations Committee from 2007 to 2009.
In addition to his own Gray County, Chisum represented a sizable geographic area of eighteen other Panhandle or West Texas counties in House District 88: Armstrong, Bailey, Briscoe, Castro, Childress, Collingsworth, Donley, Hall, Hansford, Hemphill, Hutchinson, Lamb, Lipscomb, Ochiltree, Parmer, Roberts, Swisher, and Wheeler.
From 1989 to 1993, Chisum represented District 84, which then included his Gray County.