| ZIP Codes: | 19 ZIP Codes (14 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Code: | 772 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:11:40 PM |
| Population: | 355,354 [See All] |
| FIPS: | 12111 |
| CBSA: | Port St. Lucie, FL |
| Land Area: | 548 sq mi |
| Water Area: | 30 sq mi |
| Coordinates: | 27.3799, -80.3759 |
| Quick Link: |
355,354 residents live across 19 ZIPs covering 548 sq mi, served by 2 distinct USPS-recognized cities.
Population moved from 277,499 to 355,354 from 2014 to 2024 — a +28.1% change. 13 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 34949 (Fort Pierce, $94,949 median) and poorest ZIP 34950 (Fort Pierce, $30,400) are 5.2 miles apart — a 3.1× income gap across local geography.
Median home values vary 3.1× across this county — from $158,300 in 34946 (Fort Pierce) to $483,700 in 34949 (Fort Pierce).
Density varies 116× across the county — from 31 people/sq mi in 34945 (Fort Pierce) to 3,567 in 34953 (Port Saint Lucie).
Most of the decade's growth concentrated around Port Saint Lucie — top growth ZIPs averaged +105.7% over the past ten years ( 34987 , 34984 and 34953 ).
Educational attainment ranges from 12.9% bachelor's+ in 34946 (Fort Pierce) to 48.9% in 34949 (Fort Pierce) — the breadth of educational profiles across the area.
Within Florida, this is the #20 most populous of 67 counties and ranks #36 for median household income with the #8 fastest decade growth .
On the national stage, Saint Lucie County is and #70 for decade growth .
Weighted by population, the typical household earns about $72,246 across the county — reflecting what a typical resident sees, not a simple ZIP average.
26.3% of adults age 25+ hold a bachelor's degree or higher (68,189 of 259,614 reporting). The most-educated ZIPs cluster around Port Saint Lucie.
14 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 3.1× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
Saint Lucie County grew 28.1% over the past decade — concentrated in 4 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 34953 | Port Saint Lucie | Standard | 86,875 | $85,667 | 24.4 | 34.7% |
| 34983 | Port Saint Lucie | Standard | 49,001 | $75,489 | 15.0 | 22.6% |
| 34952 | Port Saint Lucie | Standard | 42,655 | $61,628 | 25.9 | 14.4% |
| 34982 | Fort Pierce | Standard | 31,143 | $54,082 | 17.2 | 25.0% |
| 34986 | Port Saint Lucie | Standard | 30,715 | $80,047 | 20.3 | 24.4% |
| 34987 | Port Saint Lucie | Standard | 21,727 | $90,201 | 156.1 | 245.0% |
| 34984 | Port Saint Lucie | Standard | 20,151 | $80,725 | 10.2 | 37.4% |
| 34950 | Fort Pierce | Standard | 17,461 | $30,400 | 5.2 | 16.6% |
| 34951 | Fort Pierce | Standard | 17,148 | $63,122 | 24.6 | 18.3% |
| 34947 | Fort Pierce | Standard | 12,804 | $51,811 | 9.7 | 4.6% |
| 34949 | Fort Pierce | Standard | 7,470 | $94,949 | 9.3 | 7.3% |
| 34946 | Fort Pierce | Standard | 6,852 | $40,315 | 15.2 | 13.8% |
| 34945 | Fort Pierce | Standard | 6,321 | $87,568 | 204.9 | 22.5% |
| 34981 | Fort Pierce | Standard | 5,031 | $71,136 | 10.3 | -5.7% |
| 34979 | Fort Pierce | PO Box | — | — | 0.0 | — |
| 34954 | Fort Pierce | PO Box | — | — | 0.0 | — |
| 34948 | Fort Pierce | PO Box | — | — | 0.0 | — |
| 34985 | Port Saint Lucie | PO Box | — | — | 0.0 | — |
| 34988 | Port Saint Lucie | PO Box | — | — | 0.0 | — |