Sweeny
- County:
- Brazoria County
- County Seat:
- No
- Area (mi²):
- 1.988
- State:
- Texas
Sweeny is a city located in Brazoria County, Texas. Sweeny has a 2026 population of 3,602. Sweeny is currently growing at a rate of 0.5% annually but its population has decreased by -0.3% since the most recent census, which recorded a population of 3,613 in 2020.