Texas' 1st congressional district in the United States House of Representatives serves the northeastern portion of the state of Texas. As of the 2000 census, the 1st district contained 651,619 people. It consists largely of three small East Texas metropolitan areas—Texarkana, Texas, Longview–Marshall, and Tyler. With a Cook Partisan Voting Index rating of R+26, it is the most Republican district in Texas. It has been represented by Republican Nathaniel Moran since 2023.

Texarkana is a city in Bowie County, Texas, United States, in the Ark-La-Tex region. Located approximately 180 miles (290 km) from Dallas, Texarkana is a twin city with neighboring Texarkana, Arkansas. The Texas city's population was 36,193 at the 2020 census.