Gallatin
- County:
- Sumner County
- County Seat:
- Yes
- Area (mi²):
- 35.687
- State:
- Tennessee
Gallatin is a city located in Sumner County, Tennessee. Gallatin has a 2026 population of 52,489. It is also the county seat of Sumner County. Gallatin is currently growing at a rate of 4.12% annually and its population has increased by 17.1% since the most recent census, which recorded a population of 44,825 in 2020.