How many people live in St. Johns County, FL?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 334,900 people living in St. Johns County, FL. That makes St. Johns County the 21st-most populous county in Florida. It is home to 1.4% of people living in the state.
335K
population of St. Johns County, FL (2024)
1.4%
County share of the Florida population (2024)
About 334,900 people lived in St. Johns County, FL in 2024.
Population estimates, 2000–2024
What are St. Johns County, FL’s age demographics?
About 72,200 St. Johns County, FL residents are aged 65 and older in 2024. That represents 21.6% of its population. For comparison, the age group represents 21.8% of Florida’s population and 18% in the US overall.
Another 71,100 St. Johns County residents, or 21.2% of the population, were children under 18. For comparison, the age group represents 19.3% of Florida’s population and 21.6% in the US overall.
A lower share of St. Johns County, FL's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are St. Johns County, FL’s racial and ethnic demographics?
Non-Hispanic white residents make up 77.6% of the St. Johns County, FL population, higher than the national share of 57.5%.
In contrast, St. Johns County’s Hispanic population accounts for 9.7%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 5.2% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
St. Johns County, FL has a higher share of a non-Hispanic white population than Florida as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in St. Johns County, FL is St. Augustine with about 16,000 residents in 2024.
Cities and towns in St. Johns County, FL ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | St. Augustine | 16,033 |
| 2. | St. Augustine Beach | 6,808 |
| 3. | Marineland (pt.) | 1 |
| 4. | Balance of St. Johns County | 312,086 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
