St. Augustine
- County:
- St. Johns County
- County Seat:
- No
- Area (mi²):
- 9.521
- State:
- Florida
St. Augustine is a city located in St. Johns County, Florida. St. Augustine has a 2026 population of 16,033. St. Augustine is currently growing at a rate of 3.05% annually and its population has increased by 9.16% since the most recent census, which recorded a population of 14,687 in 2020.