St. Lucie County, Florida

St. Lucie County sits on Florida's Atlantic coast with Fort Pierce as its county seat, Port St. Lucie as its largest city, the Village of St. Lucie Village and unincorporated land across the rest.

The county's Facts and Stats page describes two incorporated cities, Fort Pierce (the county seat) and Port St. Lucie (the largest city), as well as the Village of St. Lucie Village, and says the rest of the county's land area is unincorporated (St. Lucie County Facts and Stats). The same page counts 21 miles of Atlantic coastline, nearly half of it protected as public preservation land, and places the county in the Port St. Lucie metropolitan statistical area, part of the larger Miami, Fort Lauderdale and Port St. Lucie combined statistical area. Under its government links, the county home page points to separate sites for Fort Pierce, Port St. Lucie and St. Lucie Village (St. Lucie County home page).

The legal outline of St. Lucie County is written into state law. Section 7.59 of the Florida Statutes describes the boundary from the Atlantic Ocean west to the line it shares with Okeechobee County, and in its stretch along the North Fork of the St. Lucie River it follows the municipal boundary of the City of Port St. Lucie and the west edge of Howard Creek (Florida Statutes section 7.59). The history note under that section starts with chapter 5567, Laws of Florida, in 1905, the year St. Lucie County was formed, with later changes in 1917, 1925, 2012 and 2020. Last verified: October 22, 2026, against the St. Lucie County home, Facts and Stats and history pages, Census tables DP03, DP04 and DP05 and the county storm guide.

The Census Bureau's American Community Survey 2020-2024 5-year estimates count 360,500 people in St. Lucie County, with a median age of 45.1 years.

In those ACS 2020-2024 estimates, 24.6 percent of St. Lucie County residents were 65 or older and 19.7 percent were under 18 (ACS 2020-2024 table DP05 for St. Lucie County). Median household income was $71,457, and workers averaged 29.3 minutes to get to work (ACS 2020-2024 table DP03 for St. Lucie County). The survey counts 160,146 housing units in the county, 78.6 percent of occupied homes are owner occupied, the median owner-occupied home value is $347,300 and median gross rent is $1,585 a month (ACS 2020-2024 table DP04 for St. Lucie County).

Other official St. Lucie County sources print higher, more recent counts, and the figures do not match. The county's Facts and Stats page gives a 2023 estimate of 373,586 next to 329,226 in the 2020 U.S. Census, and says the county gained more than 80,000 residents between 2000 and 2010 (county Facts and Stats). The Supervisor of Elections guide to officials lists the county population as 394,074 as of an April 1, 2025 state estimate (Supervisor of Elections officials guide). The ACS figure is a five-year estimate, while the other two are single-date estimates.

St. Lucie County is run by a five-member Board of County Commissioners, one commissioner per district, with five separately elected constitutional officers handling courts and records, property values, taxes, elections and law enforcement.

Section 124.01 of the Florida Statutes sets five county commissioner districts in each county, kept as nearly equal in population as possible, with one commissioner for each district (Florida Statutes section 124.01). According to the Supervisor of Elections guide, the St. Lucie County Board of County Commission meets at 6 p.m. on the first Tuesday and at 9 a.m. on the third Tuesday, in the Commission Chambers on the 3rd floor of 2300 Virginia Avenue, Fort Pierce, and commissioners, who serve four-year terms, have to reside in their district when elected (St. Lucie County guide to elected and appointed officials). The board appoints a County Administrator and a County Attorney. County administration answers at 772-462-1100 at the same Virginia Avenue address (St. Lucie County home page).

The same St. Lucie County guide lists the five constitutional officers and their offices: the Clerk of the Circuit Court at 201 S Indian River Dr, Fort Pierce; the Property Appraiser and the Tax Collector at 2300 Virginia Ave, Fort Pierce; the Sheriff at 4700 West Midway Rd, Fort Pierce; and the Supervisor of Elections at 4132 Okeechobee Rd, Fort Pierce, each with a four-year term of office. Fort Pierce, Port St. Lucie and St. Lucie Village are separate governments on top of the county: the Property Appraiser's taxing authority table lists a separate millage rate and budget hearing for the City of Fort Pierce at 100 North U.S. Hwy 1, the City of Port St. Lucie at 121 SW Port St Lucie Blvd and the Village of St. Lucie at 2841 Old Dixie Hwy (St. Lucie County taxing authority table), so the first question for many errands is which government a property sits in.

St. Lucie County's own history page traces the name to the Spanish, who began building a fort in the area on December 13, the feast day of Saint Lucia.

That county history says a Santa Lucia colony was established between present-day Vero Beach and Stuart around 1567, and that old Spanish maps label roughly that stretch of coast Santa Lucia (St. Lucie County history page). The English form, St. Lucie, was not officially used to identify the area until the 1900s, the same page notes, and it records that Seminoles, whom it identifies as Creek Indians from Alabama and Georgia, and people who had escaped slavery began to settle on the Treasure Coast.

The county as a government dates from 1905. The St. Lucie County Clerk of the Circuit Court says its office was first established in 1905 with the formation of St. Lucie County (St. Lucie County Clerk About page), and the county Facts and Stats page gives the same year. The Florida Statutes history note for the county boundary cites chapter 5567 of 1905 as the starting law.

Two changes in St. Lucie County public services are a rebuilt library under construction in Port St. Lucie and a merged bus route on the county's fare-free transit system.

The county library page says the Ravenswood Branch Library on S.W. Prima Vista Boulevard in Port St. Lucie, once called the Port St. Lucie Branch Library, shut its doors on August 30, 2025, to be rebuilt as a larger facility over roughly two years, with no services or hold pick-ups there in the meantime (St. Lucie County library locations and hours). Other Port St. Lucie branches listed on the same page include the Morningside Library at 2410 SE Morningside Boulevard and the Paula A. Lewis Library at 2950 SW Rosser Boulevard.

On the bus side, a county news release dated September 21, 2026 said Area Regional Transit would combine fixed routes 5 and 8 into an expanded route 5 from Thursday, Oct. 1, connecting Fort Pierce, Port St. Lucie and Tradition with full-service hours including Saturday service, which route 8 did not have (St. Lucie County news release on ART routes). The St. Lucie County About ART page still describes eight bus routes and three microtransit zones (About Area Regional Transit), and says ART is fare-free and serves Fort Pierce, Port St. Lucie, St. Lucie Village and the unincorporated areas of St. Lucie County.

St. Lucie County maps two hurricane evacuation zones, Zone A where storm surge runs 1 to 10 feet and Zone B where it runs 10 to 16 feet, and its emergency alert system is Alert St. Lucie.

The county hurricane preparedness guide maps both zones and the evacuation routes, lists primary and secondary shelters in Fort Pierce and Port St. Lucie schools, and gives the St. Lucie County emergency information line as 772-460-HELP (4357) and the Public Safety Department at 15305 W. Midway Rd, Fort Pierce, (772) 462-8100 (St. Lucie County hurricane preparedness guide). Its evacuation advice covers anyone living in an evacuation zone or a low-lying area and anyone in a mobile home, and it names the Special Medical Needs Shelter at the Havert L. Fenn Center, 2000 Virginia Ave., Fort Pierce. The county shelter page adds that the pet-friendly shelter is run by Animal Safety at Fort Pierce Westwood Academy (St. Lucie County shelter and evacuation page).

The St. Lucie County Emergency Preparedness Portal is the place to sign up for Alert St. Lucie texts, emails or calls, to look up an address on the interactive evacuation zone map and to see any active orders or shelter openings, which change during a storm (St. Lucie County Emergency Preparedness Portal). Zones and routes get a full treatment in the St. Lucie County hurricane evacuation zones guide, with shelters and special needs registration covered elsewhere in the safety section.

The St. Lucie County guides are grouped by section, and this table points common county questions to a one-line answer and the section with the full guide.

The St. Lucie County government section holds the Clerk of the Circuit Court and Property Appraiser guides. The safety section holds the hurricane evacuation zones and hurricane shelters guides. The places section covers the Havert L. Fenn Center and the South County Annex, the guides section covers the public library system and court case searches, and Fort Pierce and Port St. Lucie each have their own city guides.