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People Statistics · City

Population in Marathon

2010 – 2025 · 16 data points 133 of 243 · Towns of Florida Updated Oct 26, 2026
People · Marathon Monroe County Florida United States

Source: U.S. Census Bureau, Population Estimates Program, 2010 – 2025

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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 · 2025 10,060 −1.2% since 2024
Towns of Florida · 2025 133 of 243 Place 1 is the highest value.
since 2015 +10% +1.3% a year on average
share of Monroe County 12.5% Monroe County: 80,406 · 2025
Population, 2010 – 2025 people
+10% since 2015

Source: U.S. Census Bureau, Population Estimates Program, 2010 – 2025

Compared with Population · people
Marathon 10,060
Monroe County 80,406
Florida 23M
United States 342M
World 8.2B

Sources: U.S. Census Bureau, Population Estimates Program · World Bank — World Development Indicators

The series at a glance Marathon · 2010 – 2025
Latest value 10,060 · 2025
First value 8,339 · 2010
Highest 10,180 · 2024
Lowest 8,339 · 2010
Average change +1.3% a year on average
Data points 16

By year

All years · 2010 – 2025

YearMarathonChange Monroe CountyFloridaUnited StatesWorld
2025 10,060 −1.2% 80,406 23M 342M 8.2B
2024 10,180 +0.6% 82,015 23M 340M 8.1B
2023 10,115 +1.3% 82,695 23M 337M 8.1B
2022 9,985 +0.7% 82,696 22M 334M 8B
2021 9,920 +0.6% 82,261 22M 332M 7.9B
2020 9,863 +6.2% 82,851 22M 332M 7.9B
2019 9,288 +0.7% 82,155 21M — 7.8B
2018 9,225 −1.9% 81,728 21M — 7.7B
2017 9,408 +0.7% 83,029 21M — 7.6B
2016 9,347 +2.4% 82,549 21M — 7.5B
2015 9,129 +1.5% 81,444 20M — 7.4B
2014 8,990 +1.4% 80,147 20M — 7.4B
2013 8,862 +2.7% 78,780 20M — 7.3B
2012 8,633 +1.6% 76,606 19M — 7.2B
2011 8,494 +1.9% 75,103 19M — 7.1B
2010 8,339 73,448 19M — 7B

Sources: U.S. Census Bureau, Population Estimates Program · World Bank — World Development Indicators, 2010 – 2025

Ranking · Towns of Florida

2019 · Place 1 is the highest value.

Year: 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014
Highest first Lowest first A–Z
#TerritoryPopulation
225 Anna Maria 1,016
196 Apalachicola 2,318
113 Atlantic Beach 13,564
202 Atlantis 2,144
60 Aventura 40,222
185 Bal Harbour 3,103
218 Baldwin 1,406
155 Bay Harbor Islands 5,956
238 Bell 501
100 Belle Glade 16,956
170 Belleair 4,238
212 Belleair Beach 1,637
197 Belleair Bluffs 2,317
183 Biscayne Park 3,141
19 Boca Raton 97,488
48 Bonita Springs 53,342
30 Boynton Beach 79,208
45 Bradenton 55,671
227 Bradenton Beach 935
223 Bronson 1,128
137 Brooksville 8,690
182 Bunnell 3,162
215 Callahan 1,478
114 Callaway 13,342
131 Cape Canaveral 10,023
…
174 Madeira Beach 3,939
190 Malabar 2,933
203 Mangonia Park 2,135
132 Marathon 9,288
105 Marco Island 15,847
42 Margate 58,781
173 Mary Esther 4,001
…

Source: U.S. Census Bureau, Population Estimates Program, 2019

What it means

How many people live here — residents, not visitors.

How it is calculated

Official count or estimate of residents for each year: a census plus births, deaths and moves since then. Estimates are revised when a new census comes out.