County ZIP codes · Florida · FIPS 12085
Martin County, FL ZIP Codes
Martin County, Florida has 17 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 12 residential and 5 for PO boxes or a single organization. 9 of the residential ones lie mainly in Martin County and 3 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $53,013 in 34974 (Okeechobee) to $139,091 in 33478 (Jupiter) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Martin County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $70,389 and $106,265.
They carry 8 postal town names: Jupiter, Stuart, Palm City, Okeechobee, Jensen Beach, Hobe Sound, Indiantown, Canal Point.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 12 residential ZIP codes in Martin County
9 ZIP codes lie mainly in Martin County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 34997 | Stuart | 47,075 | 519 | $78k | $379k | 100% |
| 34990 | Palm City | 30,592 | 297 | $130k | $592k | 98% |
| 34957 | Jensen Beach | 23,462 | 1,434 | $70k | $417k | 62% |
| 33455 | Hobe Sound | 20,018 | 354 | $70k | $451k | 100% |
| 34994 | Stuart | 18,737 | 2,781 | $63k | $274k | 100% |
| 33469 | Jupiter | 14,686 | 1,358 | $106k | $616k | 72% |
| 34996 | Stuart | 10,653 | 1,586 | $84k | $457k | 100% |
| 34956 | Indiantown | 9,630 | 58 | $65k | $217k | 100% |
| 33438 | Canal Point | 257 | 7 | – | – | 65% |
Partly in Martin County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
7 ZIP codes of Martin County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Martin | Elsewhere |
|---|---|---|
| 33458 | 19% | Palm Beach County 81% |
| 34990 | 98% | St. Lucie County 2% |
| 34974 | 15% | Glades County 53%; Okeechobee County 22%; Highlands County 10% |
| 34957 | 62% | St. Lucie County 38% |
| 33478 | 18% | Palm Beach County 82% |
| 33469 | 72% | Palm Beach County 28% |
| 33438 | 65% | Palm Beach County 35% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Martin County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Martin County's ZIP codes use 2 prefixes: 334 and 349.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.