St. Lucie County, Florida Age & Gender Distribution (2024)
Population distribution by age and gender for St. Lucie County, Florida
St. Lucie County, Florida Age & Gender Statistics (2024)
Total Population
360,500
Median Age
45.1
Male Median
44.0
Female Median
46.3
St. Lucie County, Florida Population Growth

St. Lucie County, Florida Demographic Trend
Since 2010, the population of has changed by +33.7%%.
+33.7%% Growth
St. Lucie County, Florida Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
St. Lucie County, Florida Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 45.1 | 360,500 |
| 2023 | 45.3 | 346,237 |
| 2022 | 45.3 | 334,682 |
| 2021 | 45.3 | 324,599 |
| 2020 | 45.5 | 320,914 |
| 2019 | 45.1 | 312,947 |
| 2018 | 44.8 | 305,591 |
| 2017 | 44.6 | 298,763 |
| 2016 | 44.3 | 293,136 |
| 2015 | 43.9 | 288,006 |
| 2014 | 43.3 | 283,988 |
| 2013 | 42.9 | 281,015 |
| 2012 | 42.5 | 278,246 |
| 2011 | 42.2 | 274,693 |
| 2010 | 41.9 | 269,659 |
St. Lucie County, Florida Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.0% |
| 5–17 | 14.7% |
| 18–24 | 7.0% |
| 25–34 | 11.5% |
| 35–54 | 23.4% |
| 55–64 | 13.9% |
| 65+ | 24.6% |
Dependency Ratios for St. Lucie County, Florida
- Total Dependency Ratio:
- 79.3
- Youth Dependency:
- 35.3
- Old-Age Dependency:
- 44.0
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for St. Lucie County, Florida
The median age in St. Lucie County, Florida is 45.1 years.
According to latest Census data, the total population of St. Lucie County, Florida is 360,500.
In St. Lucie County, Florida, seniors (ages 65+) make up 24.6% of the population, while children under 18 represent 14.7%.
Based on historical data since 2010, the population in St. Lucie County, Florida is aging.