St. Johns County, Florida Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
St. Johns County, FL Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
-
B
Health Around averageHealthiest county in Florida
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B
Income Around averageWealthiest county in Florida
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A
Education Above averageBest educated county in Florida
Source: Map AI Methodology
Population: density and quick facts
| Metric | St. Johns County | Florida Avg | U.S. Average |
|---|---|---|---|
| Population | 306,934 | 22,388,905 | 337,468,954 |
| Population density (per sq mi) | 373.9 | 313.4 | 86.4 |
| Population growth (%/yr) | 4.35% | 1.47% | 0.59% |
| Median age | 42.7 | 40.2 | 37.3 |
| Households | 115,794 | 8,743,019 | 130,235,071 |
Population in St. Johns County grew by 75.4% from 2009 to 2024, reaching 306,934 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in St. Johns County is Gen X, aged 45–60, at 23.7% of residents. That is 3.0 points above Florida as a whole.
- Gen Z 13–28 54,767 17.8% -1.6 pts
- Millennials 29–44 59,660 19.4% -1.2 pts
- Gen X 45–60 72,698 23.7% +3.0 pts
- Boomers 61–79 60,284 19.6% on par
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Florida, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 51.2% of the people living in St. Johns County and men 48.8%.
- Women 51.2% Florida 51.0%
- Men 48.8% Florida 49.0%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in St. Johns County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
St. Johns County has a the economy index of B, which means it is quite prosperous.
| Metric | St. Johns County | Florida Avg | U.S. Average |
|---|---|---|---|
| Median household income | $110,606 | $74,580 | $80,455 |
| Income growth (%/yr) | 5.84% | 5.42% | 4.80% |
| Unemployment rate | 3.3% | 4.8% | 5.2% |
The median household income in St. Johns County is about 48% higher than in Florida.
Housing
| Metric | St. Johns County | Florida Avg | U.S. Average |
|---|---|---|---|
| Median home price | $428,788 | $311,338 | $248,835 |
| Median rent | $1,921 | $1,668 | $1,407 |
| Homeownership rate | 82.2% | 67.6% | 65.2% |
The median home price in St. Johns County is about 18.6 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,921 per month for that long.
Commute Time & Mobility
Commuters in St. Johns County spend about 51 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 213 hours, about 8.9 full days, spent commuting.
| Metric | St. Johns County | Florida Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 25.5 | 24.0 | 22.4 |
| Round-trip commute (min) | 51.0 | 47.9 | 44.8 |
| Yearly time spent (hours) | 213 | 200 | 187 |
| Estimated yearly cost | $6,593 | $6,189 | $5,790 |
| Work from home | 26.7% | 15.7% | 15.0% |
| Highway traffic (vehicles/day) | 14,939 | 14,318 | 8,813 |
| Local road traffic (vehicles/day) | 3,496 | 3,068 | 1,355 |
Fastest commutes among counties in
Florida:
Taylor County (13.8 min), Monroe County (16.1 min), Franklin County (16.6 min).
Slowest:
Washington County (32.8 min), Osceola County (32.3 min), Liberty County (32.1 min).
The average commute time in St. Johns County is 26 minutes, longer than the 24 minutes in Florida.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
St. Johns County has a education index of A, which means it is very educated.
| Metric | St. Johns County | Florida Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 44.2% | 30.1% | 31.6% |
| Average household size | 2.62 | 2.50 | 2.53 |
Highest education index among counties in
Florida:
St. Johns County (0.4), Leon County (0.4), Alachua County (0.4).
Lowest:
Hamilton County (0.1), Hendry County (0.1), Hardee County (0.1).
Health
St. Johns County has a health index of B, which means it is quite healthy.
| Metric | St. Johns County | Florida Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 80.2 | 77.2 | 78.3 |
| Self-rated poor health | 13.4% | 19.5% | 16.3% |
| Smokers | 15.1% | 21.3% | 19.0% |
Highest health index among counties in
Florida:
St. Johns County (0.8), Seminole County (0.8), Alachua County (0.8).
Lowest:
Glades County (0.8), Putnam County (0.8), Hendry County (0.8).
St. Johns County, FL Compared With Nearby Counties
St. Johns County, FL is the 2nd largest of the 6 counties compared here, 306,934 residents against a local median of 126,528. The measure that sets St. Johns County, FL apart most is median household income: $110,606, 55% above the local median of $71,427. That is the better end of the local range on this measure.
Median home price tells the same story from another angle: $428,788 against a local median of $279,761, 53% above it. The counties themselves spread $40,117 on median household income, so St. Johns County, FL sits at one end of an already wide local range rather than apart from it. St. Johns County, FL has the highest median household income of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| St. Johns County, FL | 306,934 | $110,606 #1/6 | $428,788 #1/6 | 25.5 min #3/6 |
| Putnam County, FL | 75,164 | $48,004 | $79,810 | 27.0 min |
| Clay County, FL | 225,443 | $88,122 | $279,761 | 31.2 min |
| Flagler County, FL | 126,528 | $77,522 | $313,477 | 22.0 min |
| Duval County, FL | 1,023,142 | $71,427 | $252,918 | 22.6 min |
| Bradford County, FL | 27,885 | $62,931 | $280,178 | 27.9 min |
Frequently Asked Questions
Common questions about St. Johns County, Florida.
What is the population of St. Johns County, Florida?
About 306,934 people live in St. Johns County, Florida, in 115,794 households of 2.6 people on average. The median age is 42.7, so residents are older than the U.S. median of 37.3 by about 5 years.
How densely populated is St. Johns County, Florida?
Averaged over its land area, St. Johns County, Florida has 374 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 4.3 times the U.S. average of 86.
Can a typical household afford a home in St. Johns County, Florida?
The median home costs 3.9 times the median household income ($428,788 against $110,606), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,921 a month takes about 21% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in St. Johns County, Florida?
Unemployment in St. Johns County, Florida is only 3.3%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How common is a college degree in St. Johns County, Florida?
44.2% of adults in St. Johns County, Florida hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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