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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

2015 · 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
222 Anna Maria 1,219
198 Apalachicola 2,231
115 Atlantic Beach 12,957
201 Atlantis 2,095
60 Aventura 39,084
184 Bal Harbour 3,101
216 Baldwin 1,421
155 Bay Harbor Islands 5,938
238 Bell 466
97 Belle Glade 17,266
171 Belleair 4,026
213 Belleair Beach 1,600
197 Belleair Bluffs 2,256
180 Biscayne Park 3,200
20 Boca Raton 92,127
50 Bonita Springs 48,246
28 Boynton Beach 74,261
47 Bradenton 51,738
226 Bradenton Beach 1,037
224 Bronson 1,094
138 Brooksville 7,949
190 Bunnell 2,739
221 Callahan 1,231
107 Callaway 14,754
130 Cape Canaveral 9,958
…
169 Madeira Beach 4,057
187 Malabar 2,795
202 Mangonia Park 2,040
133 Marathon 9,129
101 Marco Island 16,354
43 Margate 56,691
173 Mary Esther 3,943
…

Source: U.S. Census Bureau, Population Estimates Program, 2015

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.