The Ark-La-Tex is a socio-economic tri-state region where the Southern U.S. states of Arkansas, Louisiana, and Texas join together. The region contains portions of Northwest Louisiana, Northeast Texas, and South Arkansas as well as the extreme southeastern tip of Oklahoma, in McCurtain County, partly centered upon the Red River, which flows along the Texas–Oklahoma state line into Southwestern Arkansas and Northwest Louisiana.

Northeast Texas is a cultural and geographic region in the northeast corner of the U.S. state of Texas. Geographically centered on two metropolitan areas strung along Interstate 20—Tyler in the west and Longview/Marshall to the east, the areas of Greenville, Mount Pleasant, Sulphur Springs, Paris, and Texarkana in the north primarily along Interstate 30, and Jacksonville and Palestine to the south are also major cities within the region. Most of Northeast Texas is included in the interstate region of the Ark-La-Tex.