St. Johns County's 2026 population is estimated at 359,322, reflecting a 3.75% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). St. Johns County is the 21st largest county in Florida. The 2010 population was 191,268 and has grown 87.86% since 2010.
Overall: 44.2 years
Female: 44.7 years
Male: 43.7 years
There are 240,741 adults, (64,617 of whom are seniors) in St. Johns County.
Female: 156,763 (51.1%)
Male: 150,171 (48.9%)
The racial composition of St. Johns County includes 79.25% White, 5.11% Black or African American, 3.76% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 243,237 | 79.25% |
| Two or more races | 29,910 | 9.74% |
| Black or African American | 15,694 | 5.11% |
| Asian | 11,538 | 3.76% |
| Other race | 6,155 | 2.01% |
| Native American | 266 | 0.09% |
| Native Hawaiian or Pacific Islander | 134 | 0.04% |
St. Johns County 's average per capita income is $63,804. Household income levels show a median of $109,839. The poverty rate stands at 6.54%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $144,289 | - |
| Families | $134,118 | $170,789 |
| Households | $109,839 | $148,427 |
| Non Families | $53,972 | $80,693 |
Average Income
Median Household Income
Poverty Rate