St. Marks
- County:
- Wakulla County
- County Seat:
- No
- Area (mi²):
- 1.959
- State:
- Florida
St. Marks is a city located in Wakulla County, Florida. St. Marks has a 2026 population of 312. St. Marks is currently growing at a rate of 1.96% annually and its population has increased by 11.83% since the most recent census, which recorded a population of 279 in 2020.
The median household income in St. Marks is $62,321 with a poverty rate of 3.7%. The median age in St. Marks is 61 years: 65.8 years for males, and 60.8 years for females. For every 100 females there are 94.4 males.