Martin County, Florida
County seat: Stuart · Population 166,272 (2025) · 544 sq mi
Martin County is the 33rd most populous of Florida's 67 counties, with 166,272 people (2025 estimate). Its county seat is Stuart. It is part of the Treasure Coast region, one of the 10 Florida regional planning council regions. The map shows its 5 cities and towns and the 5 neighboring counties.
Martin County facts
- County seat
- Stuart
- Population (2025 estimate)
- 166,272 +5% since 2020
- Land area
- 544 sq mi 55th largest of 67
- Water area
- 209 sq mi
- Population density
- 306 per sq mi
- Established
- 1925
- Named after
- John W. Martin (1884-1958) 24th Governor of Florida, USA
- Largest city
- Palm City 26,371
- Median household income
- $82,943
- Cities and towns
- 5 plus 6 CDPs
- ZIP codes
- 12
- Time zone
- Eastern
- FIPS code
- 12085
Cities and towns in Martin County
Martin County has 5 incorporated cities, towns and villages. Populations count the people living inside Martin County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Stuart (county seat) | City | 19,451 | |
| Indiantown | Village | 6,826 | |
| Sewall's Point | Town | 2,078 | |
| Jupiter Island | Town | 841 | |
| Ocean Breeze | Town | 402 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Palm City | 26,371 | |
| Hobe Sound | 13,817 | |
| Jensen Beach | 12,531 | |
| Port Salerno | 11,184 | |
| North River Shores | 3,633 | |
| Rio | 1,232 |
ZIP codes in Martin County
12 ZIP codes reach into Martin County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 33438 also Palm Beach County
- 33455
- 33458 also Palm Beach County
- 33469 also Palm Beach County
- 33478 also Palm Beach County
- 34956
- 34957 also St. Lucie County
- 34974 also Glades, Okeechobee and Highlands counties
- 34990 also St. Lucie County
- 34994
- 34996
- 34997
Population of Martin County, 2020–2025
Martin County grew by 7,840 people (+5%) between April 2020 and July 2025: 5,757 more deaths than births and a net gain of 13,639 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 158,656 |
| 2021 | 160,224 |
| 2022 | 162,358 |
| 2023 | 163,996 |
| 2024 | 165,202 |
| 2025 | 166,272 |
Neighboring counties
- Palm Beach County south · 1,575,726 people
- St. Lucie County north · 402,449 people
- Okeechobee County northwest · 42,608 people
- Glades County west · 13,270 people
- Hendry County southwest · 48,276 people
Printable Martin County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (121 KB)
- PNG (2400 px) (78 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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