Greenbrier
- County:
- Robertson County
- County Seat:
- No
- Area (mi²):
- 7.261
- State:
- Tennessee
Greenbrier is a town located in Robertson County, Tennessee. Greenbrier has a 2026 population of 7,039. Greenbrier is currently growing at a rate of 1.21% annually and its population has increased by 1.18% since the most recent census, which recorded a population of 6,957 in 2020.