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People Statistics · City

Population in Marathon

2010 – 2025 · 16 data points 133 of 243 · Towns of Florida Updated Oct 23, 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

2014 · 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
220 Anna Maria 1,261
198 Apalachicola 2,211
115 Atlantic Beach 12,857
201 Atlantis 2,073
59 Aventura 38,590
185 Bal Harbour 2,853
216 Baldwin 1,417
153 Bay Harbor Islands 5,905
237 Bell 453
97 Belle Glade 17,396
170 Belleair 3,993
213 Belleair Beach 1,582
197 Belleair Bluffs 2,227
180 Biscayne Park 3,190
20 Boca Raton 90,166
50 Bonita Springs 46,448
28 Boynton Beach 73,362
48 Bradenton 50,544
226 Bradenton Beach 1,052
224 Bronson 1,090
138 Brooksville 7,849
191 Bunnell 2,678
222 Callahan 1,207
107 Callaway 14,644
130 Cape Canaveral 9,858
…
168 Madeira Beach 4,056
187 Malabar 2,752
202 Mangonia Park 2,006
133 Marathon 8,990
100 Marco Island 16,349
43 Margate 55,624
173 Mary Esther 3,931
…

Source: U.S. Census Bureau, Population Estimates Program, 2014

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.