St. Lucie County, Florida Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 20th-largest in Florida
The population of St. Lucie County, Florida is 346,237 as of the 2023 American Community Survey, making it the 20th-largest county in Florida. The median household income is $69,027, the median home value is $305,800, and the median age is 45.3.
The population of St. Lucie County has grown 40.4% since 2010 (278,290 → 390,670), a +2.45% annualized rate.
346,237
Population
+2.45%
Annual growth
605
People / sq mi
$69,027
Median Income
$305,800
Median Home Value
St. Lucie County covers 572 sq mi of land at 605.4 people per square mile.
About St. Lucie County, FL
St. Lucie County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 605 people per square mile. With 346,237 residents, St. Lucie County is a county in Florida. It ranks #20 among counties in Florida by population.
The typical household here earns about $69,027, below the US median of $78,538. About 7.8% of residents live below the federal poverty level, below the national 12.4%. The median home value is $305,800, with typical rent around $1,489.
Degree attainment is mid-range for US counties: 25.4% of adults hold a four-year degree, below the national 35.0%. About 10.2% of workers primarily work from home, below the national 14.0%, and the average commute runs about 29 minutes each way.
That density explains much of the rest of the profile in St. Lucie County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
St. Lucie County Population History (2010-2024)
The county of St. Lucie County had a population of 278,290 in 2010 and 390,670 in 2024, a 40.4% growth over 14 years. The peak was 390,670 in 2024. Average annual growth rate: 2.46%.
390,670
Population (2024)
278,290
Population (2010)
390,670
Peak (2024)
2.46%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 278,290 |
| 2011 | 280,481 |
| 2012 | 283,042 |
| 2013 | 285,437 |
| 2014 | 290,207 |
| 2015 | 297,471 |
| 2016 | 305,775 |
| 2017 | 313,207 |
| 2018 | 320,340 |
| 2019 | 328,063 |
| 2020 | 331,461 |
| 2021 | 344,300 |
| 2022 | 359,882 |
| 2023 | 376,186 |
| 2024 | 390,670 |
Race & Ethnicity
| White | 59.8% |
| Black or African American | 21.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.1% |
| Two or More Races | 0.0% |
Age & Sex
45.3
Median Age
50.9%
Female
49.1%
Male
24.4%
Age 65+
Age Distribution
Children (under 15): 16.2% · Seniors (65+): 24.4%
Income & Poverty
| Median household income | $69,027$-2,684 vs state |
| Mean household income | $88,516 |
| Per-capita income | $35,125 |
| Poverty rate | 7.8%-1.1% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 52.9% |
Top Industries by Employment
The largest employment sector in St. Lucie County is professional & business services, accounting for 23.2% of workers.
How residents commute
0.3%
Drive alone
1.2%
Carpool
77.9%
Public transit
10.2%
Work from home
28.5 min
Avg commute
Housing
$305,800$-19,200 vs state
Median home value
$1,489
Median rent
77.7%
Homeownership rate
154,930
Total housing units
85.0%
Occupied
15.0%
Vacant
22.3%
Renter-occupied
Social & access
87.9%
With health insurance
96.0%
With broadband internet
44.7%
Foreign-born
9.3%
Veterans (18+)
15.2%
With a disability
76.2%
Speak language other than English at home
Education
88.6%
High School+
25.4%
Bachelor's+
Largest cities in Florida
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County rankings
Frequently Asked Questions
St. Lucie County, Florida has a population of 346,237 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 20th-largest county in Florida. Population density is 605 people per square mile.
The population of St. Lucie County has grown 40.4% since 2010 (278,290 → 390,670), a +2.45% annualized rate.
The median household income in St. Lucie County, Florida is $69,027, with mean (average) household income of $88,516 and per-capita income of $35,125. 7.8% of residents live below the federal poverty level.
In St. Lucie County, the largest racial and ethnic groups are White (59.8%), Black or African American (21.0%), Hispanic or Latino (1.1%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in St. Lucie County, Florida is 45.3 years. Residents are 50.9% female and 49.1% male.
The median home value in St. Lucie County is $305,800 and median monthly rent is $1,489. 77.7% of occupied housing units are owner-occupied. The county has 154,930 total housing units, 15.0% of which are vacant.
The largest employment sector in St. Lucie County, Florida is professional, scientific, and management services, employing 23.2% of workers. The unemployment rate is 3.3%.
Jacksonville is among the largest cities associated with St. Lucie County, Florida, with a population of 961,739.
St. Lucie County, FL Climate
St. Lucie County, FL has an average annual temperature of 22.9°C (73°F) and receives about 1330 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
22.9°C
Avg Temp
1330
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 17° / 63° | 64 mm |
| February | 18° / 64° | 73 mm |
| March | 20° / 68° | 85 mm |
| April | 22° / 72° | 56 mm |
| May | 25° / 76° | 118 mm |
| June | 27° / 80° | 162 mm |
| July | 28° / 82° | 158 mm |
| August | 28° / 82° | 161 mm |
| September | 27° / 81° | 185 mm |
| October | 25° / 76° | 129 mm |
| November | 21° / 70° | 78 mm |
| December | 19° / 65° | 61 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit St. Lucie County, FL
The most comfortable months to visit St. Lucie County, FL are typically April, November and March, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 33°C high). The coldest is January (near 10°C low). September is usually the wettest month.
Where to stay near St. Lucie County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.