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

Population trends in
Figure 1: Annual population growth trend for (2010–2024).

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

Population pyramid for

Figure 2: Population distribution by age and gender for 2024.


St. Lucie County, Florida Historical Population Data

YearMedian AgePopulation
202445.1360,500
202345.3346,237
202245.3334,682
202145.3324,599
202045.5320,914
201945.1312,947
201844.8305,591
201744.6298,763
201644.3293,136
201543.9288,006
201443.3283,988
201342.9281,015
201242.5278,246
201142.2274,693
201041.9269,659

St. Lucie County, Florida Age Group Breakdown (2024)

Age CohortPercentage
Under 55.0%
5–1714.7%
18–247.0%
25–3411.5%
35–5423.4%
55–6413.9%
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.
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