St. Johns County, Florida
St. Johns County, Florida, has 346,328 residents (July 2025 estimate). Its county seat is St. Augustine. It uses Eastern Time and covers 601 sq mi (1,556 km²) of land.
- Resident population, July 2025
- 346,328
- Land area
- 601 sq mi (1,556 km²)
- County seat or government
- St. Augustine
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $109,839 ± $3,407
- Median home value
- $489,200 ± $7,570
- Median rent, with utilities
- $1,922 ± $70
- Homes lived in by their owners
- 82.2% ± 1.0 points
- County type
- County
- Metro or micro area
- Jacksonville, FL metro areaCentral county
- Water area
- 221 sq mi (572 km²)
- State
- Florida
- County code (FIPS)
- 12109
- Coordinates (central point)
- 29.881397, -81.388282
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in St. Johns County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Eastern TimeAmerica/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 3225975,016 people
- 3209253,071 people
- 3222442,092 people
- 3208437,291 people
- 3208634,855 people
- 3208129,784 people
- 3208229,289 people
- 3209521,399 people
- 3208020,894 people
- 321455,759 people
- 321315,078 people
- 320334,556 people
12 ZIP Code areas overlap St. Johns County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in St. Johns County, largest first
- St. Johns County School District306,934 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Fruit Cove, Florida (CDP)35,877 people
- Nocatee, Florida (CDP)27,442 people
- World Golf Village, Florida (CDP)26,077 people
- Palm Valley, Florida (CDP)19,796 people
- St. Augustine, Florida (city)15,351 people
- St. Augustine Shores, Florida (CDP)9,462 people
- St. Augustine Beach, Florida (city)6,860 people
- Sawgrass, Florida (CDP)4,929 people
- St. Augustine South, Florida (CDP)4,714 people
- Butler Beach, Florida (CDP)4,610 people
- Flagler Estates, Florida (CDP)4,321 people
- Vilano Beach, Florida (CDP)2,188 people
All 15
- Crescent Beach, Florida (CDP)809 people
- Hastings, Florida (CDP)432 people
- Marineland, Florida (town)13 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Putnam County, Florida29 mi southwest
- Flagler County, Florida29 mi south
- Clay County, Florida29 mi west
- Duval County, Florida35 mi northwest
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.