Berwick
- County:
- St. Mary Parish
- County Seat:
- No
- Area (mi²):
- 5.901
- State:
- Louisiana
Berwick is a town located in St. Mary Parish, Louisiana. Berwick has a 2026 population of 4,495. Berwick is currently declining at a rate of -0.73% annually and its population has decreased by -5.25% since the most recent census, which recorded a population of 4,744 in 2020.