- Home
- Marathon
- Statistics
- People
- Children under 18
People
Statistics · City
estimate
Children under 18 in Marathon
2013 – 2024 · 12 data points
136 of 391 · Towns of Florida
Updated Oct 23, 2026
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2013 – 2024
Featured spot available
Your business could be here
First in “Statistics” — with a photo and a “Featured” mark.
Take this spot
Overview
7 figures
People
21 figures
Economy
20 figures
Housing
8 figures
Education
10 figures
Tourism
3 figures
Climate
8 figures
Latest value · 2024
20.7%
+0.5 pp
since 2023
Towns of Florida · 2024
136 of 391
Place 1 is the highest value.
since 2014
+1.1 pp
vs Monroe County
+5.0 pp
Monroe County: 15.7% · 2024
Children under 18, 2013 – 2024 percent · Marathon · Monroe County · Florida · United States
+1.1 pp since 2014
0%
10%
20%
30%
2013
2016
2018
2020
2024
Marathon
Monroe 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 Marathon · 2013 – 2024
Latest value
20.7% · 2024
First value
18.9% · 2013
Highest
20.7% · 2024
Lowest
15.6% · 2018
Data points
12
By year
All years · 2013 – 2024
| Year | Marathon | Change | Monroe County | Florida | United States |
|---|---|---|---|---|---|
| 2024estimate | 20.7% | +0.5 pp | 15.7% | 19.5% | 22.0% |
| 2023estimate | 20.2% | +1.1 pp | 15.6% | 19.6% | 22.2% |
| 2022estimate | 19.0% | +2.5 pp | 15.7% | 19.6% | 22.1% |
| 2021estimate | 16.5% | −2.1 pp | 15.5% | 20.0% | 22.5% |
| 2020estimate | 18.6% | +1.9 pp | 15.3% | 19.9% | — |
| 2019estimate | 16.8% | +1.2 pp | 15.1% | 20.0% | — |
| 2018estimate | 15.6% | −2.2 pp | 15.1% | 20.1% | — |
| 2017estimate | 17.8% | +0.8 pp | 15.1% | 20.3% | — |
| 2016estimate | 17.0% | −1.8 pp | 15.0% | 20.4% | — |
| 2015estimate | 18.8% | −0.7 pp | 15.2% | 20.6% | — |
| 2014estimate | 19.6% | +0.7 pp | 15.1% | 20.8% | — |
| 2013estimate | 18.9% | 15.1% | 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 | |
|---|---|---|---|
| 391 | Wabasso Beach | 0.0% | |
| 390 | Horseshoe Beach | 0.0% | |
| 389 | Captiva | 0.0% | |
| 388 | Steinhatchee | 0.0% | |
| 387 | Homosassa | 0.0% | |
| 386 | Juno Beach | 0.9% | |
| 385 | Manasota Key | 0.9% | |
| 384 | Longboat Key | 1.2% | |
| 383 | Hutchinson Island South | 1.5% | |
| 382 | St Leo | 1.8% | |
| 381 | Hillsboro Beach | 2.0% | |
| 380 | Sanibel | 2.5% | |
| 379 | Micco | 2.8% | |
| 378 | Anna Maria | 3.1% | |
| 377 | Highland Beach | 3.3% | |
| 376 | South Palm Beach | 3.9% | |
| 375 | Daytona Beach Shores | 4.0% | |
| 374 | Fort Myers Beach | 4.2% | |
| 373 | Madeira Beach | 4.3% | |
| 372 | Treasure Island | 4.3% | |
| 371 | The Meadows | 4.7% | |
| 370 | Ponce Inlet | 4.8% | |
| 369 | Mexico Beach | 4.9% | |
| 368 | Sun City Center | 5.3% | |
| 367 | Venice | 5.6% | |
| … | |||
| 254 | Vero Beach South | 16.4% | |
| 253 | Margate | 16.4% | |
| 252 | Glenvar Heights | 16.5% | |
| 251 | Marathon | 16.5% | |
| 250 | Fruitville | 16.6% | |
| 249 | Sunny Isles Beach | 16.6% | |
| 248 | Daytona Beach | 16.6% | |
| … |
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
Marathon in numbers
Population
10,060
2025
Population growth
0.52%
2025 · United States
Population density
460
2025
Median age
45.6
2024
Children under 15
15.7%
2024 · Florida
Residents 65 and over
20.8%
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
-1,931
2025 · Monroe County