ZIP codes

ZIP codes in St. Lucie County, Florida

St. Lucie County has 17 ZIP codes. 14 lie entirely inside it and 3 are shared with neighboring counties, so part of their land and their people are elsewhere. About 364,759 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 17; With 1% or more of their land inside
Entirely inside: 14; 99% or more of their land
Shared with other counties: 3; Most with Martin County (2)
Most populated ZIP: 34953; 86,875 people · Port St. Lucie
Least populated ZIP: 34981; 5,031 people · Fort Pierce
Largest ZIP by land: 34945; 217 sq mi · Port St. Lucie

Map of the ZIP codes in St. Lucie County

Entirely in the county (99% or more of its land)
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in St. Lucie County

17 ZIP codes in St. Lucie County, FL, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
34945	Port St. Lucie	6,321	100%	6,321
34946	Fort Pierce North	6,852	100%	6,852
34947	Fort Pierce	12,804	100%	12,804
34949	Fort Pierce	7,470	100%	7,470
34950	Fort Pierce	17,461	100%	17,461
34951	Lakewood Park	17,148	100%	17,148
34952	Port St. Lucie	42,655	100%	42,655
34953	Port St. Lucie	86,875	100%	86,875
34957	Jensen Beach	23,462	38%	≈ 6,879
34972	Yeehaw Junction	20,066	5.8%	≈ 949
34981	Fort Pierce	5,031	100%	5,031
34982	Fort Pierce	31,143	100%	31,143
34983	Port St. Lucie	49,001	100%	49,001
34984	Port St. Lucie	20,151	100%	20,151
34986	Port St. Lucie	30,715	100%	30,715
34987	Port St. Lucie	21,727	100%	21,727
34990	Palm City	30,592	1.8%	≈ 1,577

ZIP codes shared with other counties

These 3 ZIP codes have part of their land in another county. The first figure is the share of their land in St. Lucie County; then, where the rest lies.

34957 (Jensen Beach): 38% here; 62% in Martin County.
34972 (Yeehaw Junction): 5.8% here; 80% in Okeechobee County and 14% in Osceola County.
34990 (Palm City): 1.8% here; 98% in Martin County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Port St. Lucie (7), Fort Pierce (5), Fort Pierce North (1), Jensen Beach (1), Lakewood Park (1), and Palm City (1); 7 places in all.

All 17 start with the same three digits, 349: the prefix of the USPS sorting center that handles them.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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