Texline is a town in northwestern Dallam County, Texas, United States.

The town sits on U.S. Highway 87, which continues southeast towards Dalhart and northwest towards Clayton, New Mexico.

For years, a simmering dispute has existed over whether Texline is lawfully a part of Texas or New Mexico.

This survey error resulted in the current towns of Texline, Farwell, Bledsoe, Bronco, and a part of Glenrio being within the State of Texas.

The disputed strip, hundreds of miles long, includes parts of valuable oilfields of the Permian Basin.

[6][7] According to the United States Census Bureau, the town has a total area of 1.0 square mile (2.6 km2), all land.