High Quality Content by WIKIPEDIA articles! The city of Denton is the county seat of Denton County, Texas in the United States. Its population was 119,454 according to the 2010 U.S. Census, making it the eleventh largest city in the Dallas/Fort Worth Metroplex. Geographically, it is situated 38 miles (61 km) south of the Oklahoma–Texas border and 39 miles (63 km) northwest of Dallas.