• county
  • FIPS 12111
  • Largest town: Port St. Lucie

St. Lucie County, Florida

St. Lucie County had 390,670 residents in the Census Vintage 2024 estimate, on 571.9 square miles of land. It ranks 20th of 67 in Florida by population and 49th by land area.

Population
390,670
#20 of 67 in Florida · #196 in US
Area
571.9 sq mi
#49 of 67 in Florida · #1,755 in US
Density
683 / sq mi
#12 of 67 in Florida · #214 in US
Median household income
$66,876
#33 of 67 in Florida · #1,219 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

St. Lucie County within Florida. Pin: Tallahassee.

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Tools and pages that start from St. Lucie County

St. Lucie County population, land area and income

St. Lucie County had 390,670 residents in the Census Vintage 2024 estimate, on 571.9 square miles of land. It ranks 20th of 67 in Florida by population and 49th by land area. That works out to 683.1 people per square mile, 7.1 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in Florida has 154,693 residents, so St. Lucie County is 2.5 times that size.

Its SAIPE 2023 median household income of $66,876 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

390,670

3144th1st

196th of 3,144 (US)

Land area

572 sq mi

3144th1st

1755th of 3,144 (US)

Density

683.1 / sq mi

3144th1st

214th of 3,144 (US)

Median household income

$66,876

3143rd1st

1219th of 3,143 (US)

Rank within Florida (67)

Population

390,670

67th1st

20th of 67 (FL)

Land area

572 sq mi

67th1st

49th of 67 (FL)

Density

683.1 / sq mi

67th1st

12th of 67 (FL)

Median household income

$66,876

67th1st

33rd of 67 (FL)

How St. Lucie County's population changed since 2020

St. Lucie County gained 59,209 residents between the July 2020 and July 2024 estimates, a rise of 17.9%. That ranks 5th of 67 in Florida for growth. The median Florida county changed by +7.8%, and the state as a whole by +8.2%.

Since the April 2020 estimates base, St. Lucie County recorded 14,759 births and 17,734 deaths, a natural change of -2,975. Net international migration added +7,829 and net domestic migration, people moving to or from other US counties, came to +56,490. The largest single component was domestic migration, which added 56,490 people.

331.5k2020344.3k2021359.9k2022376.2k2023390.7k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
14,759
Deaths
17,734
Net international migration
+7,829
Net domestic migration
+56,490
Change, July 2023 to July 2024
+14,484

Where St. Lucie County is

The Census internal point of St. Lucie County is at 27.379800, -80.443500. It sits in UTM zone 17N. The map shades Florida's 67 county-equivalents by population change from 2020 to 2024, darker for faster growth, with St. Lucie County outlined. Dots are towns of 1,000+ people with residents in it.

Escambia County: +2.7%Okaloosa County: +4.0%St. Lucie County: +17.9%Okeechobee County: +6.8%DeSoto County: +7.8%Bradford County: -0.5%Bay County: +14.4%Holmes County: +1.6%Gilchrist County: +13.1%Manatee County: +14.1%Hardee County: +2.9%Lafayette County: +5.0%Flagler County: +17.9%Nassau County: +14.7%Pasco County: +16.4%Martin County: +4.4%Palm Beach County: +5.9%Alachua County: +4.3%Lee County: +12.5%Brevard County: +8.2%Polk County: +16.8%Pinellas County: +0.6%Highlands County: +8.3%Hamilton County: +4.4%Wakulla County: +9.5%Clay County: +8.1%Suwannee County: +9.2%Madison County: +2.9%Columbia County: +6.0%Jackson County: +6.1%Calhoun County: -3.1%Franklin County: +4.0%Gulf County: +11.3%Hernando County: +11.5%Washington County: +4.7%Levy County: +10.9%Liberty County: +1.9%Putnam County: +5.3%Volusia County: +8.5%Walton County: +18.2%Osceola County: +19.7%Leon County: +2.2%Union County: +2.0%Sarasota County: +9.2%Dixie County: +5.6%Charlotte County: +12.8%Indian River County: +7.3%Broward County: +4.8%Hendry County: +16.1%Sumter County: +18.7%Miami-Dade County: +5.3%Citrus County: +10.1%Seminole County: +4.9%Lake County: +15.0%Marion County: +13.6%St. Johns County: +20.9%Gadsden County: +1.7%Jefferson County: +10.5%Baker County: +4.3%Glades County: +8.7%Collier County: +10.3%Duval County: +5.7%Taylor County: +0.4%Monroe County: -2.3%Hillsborough County: +7.8%Santa Rosa County: +9.9%Orange County: +7.1%
Change 2020 to 2024
  1. < +4.0%
  2. < +5.7%
  3. < +8.7%
  4. < +13.1%
  5. ≥ +13.1%
no data

Orange pin: St. Lucie County internal point. Dark pin: Tallahassee.

Internal point

Decimal
27.379800, -80.443500
DMS
27°22'47.28"N 80°26'36.60"W
UTM
17N 555027.1E 3028625.6N
Geohash
dhygc2qff
Plus code
76VX9HH4+WJ

Towns in St. Lucie County

2 incorporated places of 1,000+ people have residents in St. Lucie County, 309,380 people together, or 79% of the county. Each figure counts only the part of the town inside St. Lucie County; towns marked "part" extend into another county. The largest is Port St. Lucie with 258,575.

  1. 01Port St. Lucie258,575
  2. 02Fort Pierce50,805
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering St. Lucie County

The Census 2024 county adjacency file lists 3 neighbors for St. Lucie County. The most populous is Indian River County, FL, with 172,139 residents. Distances run between Census internal points in a straight line.

Distance to Tallahassee and the nearest big city

Tallahassee is 313.8 miles NW of St. Lucie County's internal point in a straight line. The nearest place of 100,000 or more is Port St. Lucie, FL (population 258,575), 7.6 miles away. The nearest place of 10,000 or more is Fort Pierce, FL (population 50,805), 7.0 miles away.

St. Lucie County FIPS code

The FIPS code of St. Lucie County is 12111: state code 12 for Florida plus county code 111. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $66,876.

Questions people ask

What is the population of St. Lucie County, Florida?

The Census Vintage 2024 estimate for July 1, 2024 is 390,670. That is up 59,209 people (17.9%) from the July 2020 estimate of 331,461.

What is the FIPS code of St. Lucie County?

12111. The first two digits (12) are Florida; the last three (111) identify the county.

What is the largest town in St. Lucie County?

Port St. Lucie, with 258,575 residents inside St. Lucie County in 2024.

Which counties border St. Lucie County?

3 county-equivalents border it in the Census 2024 adjacency file: Indian River County, FL; Martin County, FL; Okeechobee County, FL.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.