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People
Statistics · City
estimate
Children under 18 in Key Biscayne
2013 – 2024 · 12 data points
11 of 391 · Towns of Florida
Updated Oct 23, 2026
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2013 – 2024
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Overview
7 figures
People
21 figures
Economy
20 figures
Housing
8 figures
Education
10 figures
Tourism
3 figures
Climate
8 figures
Latest value · 2024
31.8%
+1.0 pp
since 2023
Towns of Florida · 2024
11 of 391
Place 1 is the highest value.
since 2014
+0.5 pp
vs Miami-Dade County
+11.8 pp
Miami-Dade County: 20.0% · 2024
Children under 18, 2013 – 2024 percent · Key Biscayne · Miami-Dade County · Florida · United States
+0.5 pp since 2014
0%
10%
20%
30%
40%
2013
2016
2018
2020
2024
Key Biscayne
Miami-Dade 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 Key Biscayne · 2013 – 2024
Latest value
31.8% · 2024
First value
32.3% · 2013
Highest
32.3% · 2013
Lowest
26.8% · 2016
Data points
12
By year
All years · 2013 – 2024
| Year | Key Biscayne | Change | Miami-Dade County | Florida | United States |
|---|---|---|---|---|---|
| 2024estimate | 31.8% | +1.0 pp | 20.0% | 19.5% | 22.0% |
| 2023estimate | 30.8% | −0.7 pp | 20.1% | 19.6% | 22.2% |
| 2022estimate | 31.4% | −0.9 pp | 20.1% | 19.6% | 22.1% |
| 2021estimate | 32.3% | +0.8 pp | 20.5% | 20.0% | 22.5% |
| 2020estimate | 31.5% | +3.5 pp | 20.4% | 19.9% | — |
| 2019estimate | 28.0% | +0.4 pp | 20.5% | 20.0% | — |
| 2018estimate | 27.7% | −0.0 pp | 20.4% | 20.1% | — |
| 2017estimate | 27.7% | +0.9 pp | 20.5% | 20.3% | — |
| 2016estimate | 26.8% | −2.2 pp | 20.6% | 20.4% | — |
| 2015estimate | 29.0% | −2.3 pp | 20.9% | 20.6% | — |
| 2014estimate | 31.3% | −1.1 pp | 21.1% | 20.8% | — |
| 2013estimate | 32.3% | 21.4% | 21.0% | — |
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2013 – 2024
Ranking · Towns of Florida
2021 · Place 1 is the highest value.
| # | Territory | Children under 18 | |
|---|---|---|---|
| 1 | Wimauma | 39.9% | |
| 2 | Biscayne Park | 39.4% | |
| 3 | Eglin AFB | 39.3% | |
| 4 | Florida City | 37.1% | |
| 5 | Mangonia Park | 36.9% | |
| 6 | Naranja | 36.3% | |
| 7 | Gibsonton | 33.8% | |
| 8 | Parkland | 32.6% | |
| 9 | Surfside | 32.4% | |
| 10 | Key Biscayne | 32.3% | |
| 11 | Immokalee | 32.1% | |
| 12 | Homestead | 31.9% | |
| 13 | Laurel Hill | 31.1% | |
| 14 | Gladeview | 31.1% | |
| 15 | Seville | 31.0% | |
| 16 | Bay Harbor Islands | 30.2% | |
| 17 | Nocatee | 30.2% | |
| 18 | Perry | 29.8% | |
| 19 | Fellsmere | 29.7% | |
| 20 | Hurlburt Field | 29.6% | |
| 21 | Eastpoint | 29.5% | |
| 22 | West Perrine | 29.4% | |
| 23 | Weston | 29.0% | |
| 24 | Haverhill | 29.0% | |
| 25 | De Leon Springs | 28.9% | |
| … |
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2021
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
Statistics: Key Biscayne
Population
14,815
2025
Population growth
0.52%
2025 · United States
Population density
4,587
2025
Median age
42.2
2024
Children under 15
15.7%
2024 · Florida
Residents 65 and over
15.7%
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
-72,254
2025 · Miami-Dade County