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People
Statistics · Area
estimate
Children under 18 in Martin County
2013 – 2024 · 12 data points
56 of 67 · Regions of Florida
Updated Oct 23, 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
16.1%
−0.1 pp
since 2023
Regions of Florida · 2024
56 of 67
Place 1 is the highest value.
since 2014
−1.1 pp
vs Florida
−3.4 pp
Florida: 19.5% · 2024
Children under 18, 2013 – 2024 percent · Martin County · Florida · United States
−1.1 pp since 2014
0%
10%
20%
30%
2013
2016
2018
2020
2024
Martin 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 Martin County · 2013 – 2024
Latest value
16.1% · 2024
First value
17.4% · 2013
Highest
17.4% · 2013
Lowest
16.0% · 2022
Data points
12
By year
All years · 2013 – 2024
| Year | Martin County | Change | Florida | United States |
|---|---|---|---|---|
| 2024estimate | 16.1% | −0.1 pp | 19.5% | 22.0% |
| 2023estimate | 16.2% | +0.2 pp | 19.6% | 22.2% |
| 2022estimate | 16.0% | −0.4 pp | 19.6% | 22.1% |
| 2021estimate | 16.4% | +0.1 pp | 20.0% | 22.5% |
| 2020estimate | 16.3% | −0.2 pp | 19.9% | — |
| 2019estimate | 16.5% | −0.1 pp | 20.0% | — |
| 2018estimate | 16.6% | −0.2 pp | 20.1% | — |
| 2017estimate | 16.8% | −0.1 pp | 20.3% | — |
| 2016estimate | 16.9% | −0.2 pp | 20.4% | — |
| 2015estimate | 17.1% | −0.1 pp | 20.6% | — |
| 2014estimate | 17.2% | −0.2 pp | 20.8% | — |
| 2013estimate | 17.4% | 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 | |
|---|---|---|---|
| 67 | Sumter County | 7.1% | |
| 66 | Charlotte County | 11.8% | |
| 65 | Glades County | 13.2% | |
| 64 | Sarasota County | 14.0% | |
| 63 | Citrus County | 14.7% | |
| 62 | Indian River County | 15.0% | |
| 61 | Gulf County | 15.1% | |
| 60 | Pinellas County | 15.4% | |
| 59 | Franklin County | 15.4% | |
| 58 | Monroe County | 15.7% | |
| 57 | Flagler County | 16.1% | |
| 56 | Martin County | 16.1% | |
| 55 | Collier County | 16.3% | |
| 54 | Highlands County | 16.7% | |
| 53 | Jefferson County | 17.2% | |
| 52 | Lee County | 17.2% | |
| 51 | Lafayette County | 17.3% | |
| 50 | Volusia County | 17.4% | |
| 49 | Manatee County | 17.5% | |
| 48 | Madison County | 17.7% | |
| 47 | Alachua County | 17.8% | |
| 46 | Dixie County | 17.9% | |
| 45 | DeSoto County | 17.9% | |
| 44 | Brevard County | 18.1% | |
| 43 | Leon County | 18.5% | |
| … |
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
Martin County in numbers
Population
166K
2025
Population growth
0.52%
2025 · United States
Population density
118
2025
Median age
53.3
2024
Children under 15
15.7%
2024 · Florida
Residents 65 and over
32.2%
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
1,671
2025