Longview is the forty-fifth largest city in the state of Texas. The city is mostly located in Gregg County, of which it is the county seat; a small part of Longview extends into the western part of neighboring Harrison County. Longview is located in East Texas, where Interstate 20 and U.S. Highways 80 and 259 converge just north of the Sabine River. Amazing bodyrub providers, nuru massage Longview, TX directory.