St. Johns   County FL United States

County FIPS 12109
Largest City St. Augustine
State Florida
Latitude 29.9016
Longitude -81.4407
Population 306,934
Density 511.14 people per square mile
Time Zone America/New York
  • All demographic data comes from the 2024 American Community Survey (5-year study).
  • Learn more about each field.
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Household Income

Median household: $109,839
Median individual: $51,276

Race

Mode: 79.2% White

Gender

 51.1% female 

Rent

  $1922 / month  

Median house value: $490,966.0

Age

Median: 44.2 years old

Education

With at least college degree: 50.9%
With STEM degree: 42.6%

Marital Status

 59.8% married 

Never married: 23.3%

Labor Force Participation

 60.6% working 

Unemployed: 3.3%

Average Family Size

 3.04 people 

Commute Time

 26.9 minutes 

Health Care

 5.3% uninsured 

Poverty

 6.5%

All data comes from the SimpleMaps US Counties Database, 2026.

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