According to the United States Census Bureau, the county has a total area of 633 square miles (1,640 km2), of which 5.3 square miles (14 km2) (0.8%) are covered by water.

[5] Wichita County is part of the Texas Red Beds, which are strata of red-colored sedimentary rock from the Early Permian.

The fossils of Permian period vertebrates in the Texas Red Beds were first discovered by Edward Drinker Cope in 1877.

[6][7] Subsequent research has revealed rare fossils of Permian period amphibians like Trimerorhachis,[8] as well as rich deposits of other Permian tetrapods such as Dimetrodon and Diadectes.

[9] As of the census[16] of 2000, 131,664 people, 48,441 households, and 32,891 families resided in the county.

The Texas Department of Criminal Justice James V. Allred Unit is located in Wichita County.

4 Jeff Watts The sheriff of Wichita County is David Duke.

Wichita County has consistently voted for the Republican Party in presidential elections since 1980.