Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Palm City | 1 | 26,430 | 25,038 | 0.91% | 1,907 | 13.9 | CDP |
| Stuart | 2 | 20,059 | 17,541 | 3.24% | 2,819 | 7.1 | City |
| Hobe Sound | 3 | 14,632 | 14,764 | 1.54% | 2,059 | 7.1 | CDP |
| Jupiter Farms | 4 | 13,585 | 13,045 | 0.84% | 901 | 15.1 | CDP |
| Jensen Beach | 5 | 12,727 | 13,592 | 0.58% | 1,825 | 7.0 | CDP |
| Port Salerno | 6 | 11,665 | 12,070 | 0.98% | 3,271 | 3.6 | CDP |
| Indiantown | 7 | 6,817 | 6,569 | 0.92% | 481 | 14.2 | Village |
| Tequesta | 8 | 6,127 | 6,153 | -0.11% | 3,344 | 1.8 | Village |
| Hutchinson Island South | 9 | 4,037 | 5,025 | -2.02% | 938 | 4.3 | CDP |
| North River Shores | 10 | 3,442 | 3,895 | 0.76% | 2,719 | 1.3 | CDP |
| Sewall's Point | 11 | 2,086 | 1,996 | 1.07% | 1,771 | 1.2 | Town |
| Limestone Creek | 12 | 1,534 | 1,704 | 2.47% | 3,923 | 0.4 | CDP |
| Rio | 13 | 1,441 | 705 | 2.42% | 3,812 | 0.4 | CDP |
| Jupiter Island | 14 | 833 | 811 | 0.6% | 307 | 2.7 | Town |
| Jupiter Inlet Colony | 15 | 433 | 404 | 1.64% | 2,794 | 0.2 | Town |
| Ocean Breeze | 16 | 433 | 308 | 7.71% | 2,624 | 0.2 | Town |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Palm City is the largest city in Martin County.
Ocean Breeze is the smallest city in Martin County.
There are 16 cities in Martin County, Florida.