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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
243 Otter Creek 114
242 Horseshoe Beach 165
241 Layton 206
240 Ebro 242
239 Sopchoppy 415
238 Bell 466
237 Westlake 479
236 Jay 509
235 Yankeetown 534
234 Sea Ranch Lakes 537
233 Laurel Hill 558
232 Melbourne Village 673
231 Cedar Key 687
230 Shalimar 733
229 Jupiter Island 810
228 Golden Beach 966
227 Medley 969
226 Bradenton Beach 1,037
225 Mexico Beach 1,066
224 Bronson 1,094
223 San Antonio 1,181
222 Anna Maria 1,219
221 Callahan 1,231
220 Palm Beach Shores 1,254
219 Indian Shores 1,278
…
136 Indian Harbour Beach 8,596
135 Lake Park 8,671
134 Palm Beach 8,792
133 Marathon 9,129
132 St Pete Beach 9,165
131 Milton 9,227
130 Cape Canaveral 9,958
…

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.