St. Marys
- County:
- Camden County
- County Seat:
- No
- Area (mi²):
- 25.523
- State:
- Georgia
St. Marys is a city located in Camden County, Georgia. St. Marys has a 2026 population of 20,119. St. Marys is currently growing at a rate of 2.9% annually and its population has increased by 8.55% since the most recent census, which recorded a population of 18,534 in 2020.