Texline is a town in northwestern Dallam County, Texas, United States. The population was 511 at the 2000 census. The town is named for its location near the New Mexico-Texas state line. U.S. Highway 87 constitutes the main street of Texline.
From Highway 87 just west of Texline, one gets the first glimpse of the Rocky Mountains as they slowly rise in northeastern New Mexico.
W.A. Criswell, veteran pastor of the First Baptist Church of Dallas, Texas, was born in Oklahoma but reared in Texline.