St. Johns County, Florida
Located in Florida, St. Johns County has a population of 306,934 residents and a median age of 44.2 years, making it the #236 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 6.5%. The median home value is $489,200, and the median household income is $109,839, which is 46% above the national median.
Demographics
St. Johns County has a population of 306,934, making it the #236 most populous county in the US. The median age is 44.2 years, which is 13.6% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in St. Johns County is $109,839, ranking #102 out of 3,222 counties — 46.2% above the national median. The poverty rate is 6.5% and unemployment stands at 3.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in St. Johns County is $489,200 (+73.5% vs national). Renters pay a median of $1,922/mo and the homeownership rate is 82.2%.
Median Home Value Trend
Rankings →Household Type
Education
In St. Johns County, 50.9% of adults age 25+ hold a bachelor's degree or higher, which is 51.1% above the national average, ranking #90 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in St. Johns County is 81.0 years. 11.3% of adults report poor or fair health and 8.0% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
9.3% of adults in St. Johns County smoke , 26.5% are obese , and 22.3% report excessive drinking. The drug overdose death rate is 19.0 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in St. Johns County is 2.9 per 100,000 and the suicide rate is 14.8 per 100,000. Motor vehicle deaths occur at a rate of 13.1 per 100,000.
Homicide Rate Trend
Families & Children
5.8% of children in St. Johns County live in poverty and the infant mortality rate is 4.8 per 1,000 live births. The teen birth rate is 5.6 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in St. Johns County is 91.1%. The mean commute time is 29.0 min, which is 4.9% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, St. Johns County voted Republican with a margin of 31.3%. The vote was 33.9% Dem / 65.2% Rep. Compared to 2020, the margin shifted 4.7 toward Republicans .
Vote Share Over Time
About St. Johns County, Florida
St. Johns County, Florida has a total population of 306,934, making it the 236th most populous county in the United States. The median age in St. Johns County is 44.2 years, which is 13.6% above the national median of 38.9 years.
The median household income in St. Johns County is $109,839, which ranks #102 of 3,222 counties nationwide. This is 46.2% above the national median of $75,149. The poverty rate is 6.5%, lower than the national rate of 12.6%. The unemployment rate stands at 3.3%.
The median home value in St. Johns County is $489,200, 73.5% above the national median. Renters in St. Johns County pay a median gross rent of $1,922 per month. The homeownership rate is 82.2%, compared to the national rate of 64.4%.
In St. Johns County, 50.9% of residents aged 25 and older hold a bachelor's degree or higher, 51.1% above the national average of 33.7%. Health insurance coverage stands at 94.7% of the population. The average commute time for workers is 29.0 min.
St. Johns County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 77.4% of the population, followed by Hispanic or Latino (9.1%) and Black (non-Hispanic) (4.9%).
All data for St. Johns County, Florida comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.