Decatur
- County:
- Wise County
- County Seat:
- Yes
- Area (mi²):
- 9.281
- State:
- Texas
Decatur is a city located in Wise County, Texas. Decatur has a 2026 population of 8,266. It is also the county seat of Wise County. Decatur is currently growing at a rate of 2.98% annually and its population has increased by 24% since the most recent census, which recorded a population of 6,666 in 2020.