How many people live in St. Lucie County, FL?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 390,700 people living in St. Lucie County, FL. That makes St. Lucie County the 20th-most populous county in Florida. It is home to 1.7% of people living in the state.
391K
population of St. Lucie County, FL (2024)
1.7%
County share of the Florida population (2024)
About 390,700 people lived in St. Lucie County, FL in 2024.
Population estimates, 2000–2024
What are St. Lucie County, FL’s age demographics?
About 96,400 St. Lucie County residents are aged 65 and older in 2024. That represents 24.7% of its population. For comparison, the age group represents 21.8% of Florida’s population and 18% in the US overall.
Another 76,200 St. Lucie County residents, or 19.5% of the population, were children under 18. For comparison, the age group represents 19.3% of Florida’s population and 21.6% in the US overall.
A higher share of St. Lucie County, FL's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are St. Lucie County, FL’s racial and ethnic demographics?
Hispanic residents make up 23.3% of the St. Lucie County, FL population, higher than the national share of 20%. St. Lucie County also has a larger share of people identifying as non-Hispanic Black or African American (22.7%) than the US overall (12.6%).
In contrast, St. Lucie County’s non-Hispanic white population accounts for 49.8%, below the 57.5% nationwide, and the non-Hispanic Asian population makes up 2% of the county, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
St. Lucie County, FL has a higher share of a non-Hispanic Black or African American population than Florida as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in St. Lucie County, FL is Port St. Lucie with about 258,600 residents in 2024.
Cities and towns in St. Lucie County, FL ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Port St. Lucie | 258,575 |
| 2. | Fort Pierce | 50,805 |
| 3. | St. Lucie Village | 615 |
| 4. | Balance of St. Lucie County | 80,675 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
