Decatur is a city located in Wise County, Texas, United States. This city was named after Stephen Decatur, Jr. The population was 5,201 at the 2000 census. A July 1, 2008 U.S. Census Bureau estimate placed the population at 6,432. It is the county seat of Wise County. Decatur is part of the Dallas/Fort Worth Metroplex and is located 25 miles northwest of Fort Worth and 45 miles northwest of Dallas.
Decatur is located at 33°13′52″N 97°35′19″W / 33.23111°N 97.58861°W / 33.23111; -97.58861 (33.231073, -97.588628).