 The Denton County Courthouse-on-the-Square was built in 1896, and today the building currently houses various government offices, as well as a museum.According to the U.S. Census Bureau, the county has a total area of , of which are land and (7.8%) are covered by water.Denton County is located in the northern part of the Dallas-Fort Worth metroplex, about 35 miles south of the border between Texas and Oklahoma.