Texas's 13th congressional district is a congressional district in the U.S. state of Texas that includes most of the Texas Panhandle, parts of Texoma and northwestern parts of North Texas. The principal cities in the district are Amarillo, Gainesville and Wichita Falls. It winds across the Panhandle into the South Plains, then runs east across the Red River Valley. Covering over 40,000 square miles (100,000 km2), it is the 19th-largest district by area in the nation, the 14th-largest that does not cover an entire state, as well as the second-largest in Texas behind the 23rd congressional district. It covers more land mass than thirteen entire states. After the 2020 census was completed, the 13th district was heavily redrawn to incorporate Denton, an increasingly Democratic-leaning suburb of the Dallas-Fort Worth metroplex which had previously anchored the 26th district. With a Cook Partisan Voting Index rating of R+26, it is one of the most Republican districts in Texas.

Wichita Falls is a city in and the county seat of Wichita County, Texas, United States. It is the principal city of the Wichita Falls metropolitan statistical area, which encompasses all of Archer, Clay, and Wichita Counties. According to the 2020 census, it had a population of 102,316, making it the 39th-most populous city in Texas.