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People
Statistics · Area
estimate
Children under 18 in St. Johns County
2013 – 2024 · 12 data points
14 of 67 · Regions of Florida
Updated Oct 22, 2026
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2013 – 2024
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Overview
6 figures
People
21 figures
Economy
20 figures
Housing
8 figures
Education
10 figures
Tourism
3 figures
Climate
3 figures
Latest value · 2024
21.6%
−0.1 pp
since 2023
Regions of Florida · 2024
14 of 67
Place 1 is the highest value.
since 2014
−0.9 pp
vs Florida
+2.1 pp
Florida: 19.5% · 2024
Children under 18, 2013 – 2024 percent · St. Johns County · Florida · United States
−0.9 pp since 2014
0%
10%
20%
30%
2013
2016
2018
2020
2024
St. Johns County
Florida
United States
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2013 – 2024
Compared with Children under 18 · percent
Source: U.S. Census Bureau, American Community Survey 5-year estimates
The series at a glance St. Johns County · 2013 – 2024
Latest value
21.6% · 2024
First value
22.7% · 2013
Highest
22.7% · 2013
Lowest
21.5% · 2022
Data points
12
By year
All years · 2013 – 2024
| Year | St. Johns County | Change | Florida | United States |
|---|---|---|---|---|
| 2024estimate | 21.6% | −0.1 pp | 19.5% | 22.0% |
| 2023estimate | 21.7% | +0.2 pp | 19.6% | 22.2% |
| 2022estimate | 21.5% | −0.4 pp | 19.6% | 22.1% |
| 2021estimate | 21.9% | +0.1 pp | 20.0% | 22.5% |
| 2020estimate | 21.8% | −0.1 pp | 19.9% | — |
| 2019estimate | 21.8% | −0.1 pp | 20.0% | — |
| 2018estimate | 21.9% | −0.1 pp | 20.1% | — |
| 2017estimate | 22.0% | −0.0 pp | 20.3% | — |
| 2016estimate | 22.1% | −0.2 pp | 20.4% | — |
| 2015estimate | 22.2% | −0.2 pp | 20.6% | — |
| 2014estimate | 22.4% | −0.2 pp | 20.8% | — |
| 2013estimate | 22.7% | 21.0% | — |
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2013 – 2024
Ranking · Regions of Florida
2024 · Place 1 is the highest value.
| # | Territory | Children under 18 | |
|---|---|---|---|
| 1 | Hendry County | 24.9% | |
| 2 | Hardee County | 24.4% | |
| 3 | Baker County | 24.3% | |
| 4 | Osceola County | 23.9% | |
| 5 | Clay County | 22.8% | |
| 6 | Okaloosa County | 22.6% | |
| 7 | Duval County | 22.4% | |
| 8 | Columbia County | 22.2% | |
| 9 | Gadsden County | 22.1% | |
| 10 | Polk County | 22.0% | |
| 11 | Santa Rosa County | 21.8% | |
| 12 | Union County | 21.7% | |
| 13 | Hillsborough County | 21.6% | |
| 14 | St. Johns County | 21.6% | |
| 15 | Orange County | 21.4% | |
| 16 | Okeechobee County | 21.4% | |
| 17 | Putnam County | 21.2% | |
| 18 | Gilchrist County | 21.2% | |
| 19 | Bay County | 21.1% | |
| 20 | Walton County | 20.9% | |
| 21 | Escambia County | 20.9% | |
| 22 | Suwannee County | 20.9% | |
| 23 | Broward County | 20.8% | |
| 24 | Wakulla County | 20.7% | |
| 25 | Hamilton County | 20.6% | |
| … |
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2024
What it means
The share of residents who are children and teenagers.
How it is calculated
Residents under 18 divided by the total population.
People
St. Johns County in numbers
Population
346K
2025
Population growth
0.52%
2025 · United States
Population density
223
2025
Median age
44.2
2024
Children under 15
15.7%
2024 · Florida
Residents 65 and over
21.1%
2024
Life expectancy
77.9
2022 · Florida
Births per woman
1.63
2024 · United States
Birth rate
10.6
2024 · United States
Infant mortality
5.5
2024 · United States
Net migration
3.9
2023 · United States
Net domestic migration
12,549
2025