Homes for Sale in Denton, TX Denton is a city in the U.S. state of Texas and the county seat of Denton County. As of the 2010 United States Census, its population was 113,383,making it the 27th most populous city in Texas and the 11th-largest city in the Dallas–Fort Worth metroplex. A Texas land grant led to the formation of Denton County in 1846, and the city was incorporated in 1866. Both were named after pioneer and Texas militia captain John B. Denton. Selling a home? Get a free Market Analysis of your home and find out its value in (1 comments)