Boone County, Iowa Age & Gender Statistics (2024)

Total Population

26,668

Median Age

42.4

Male Median

41.0

Female Median

43.8

Boone County, Iowa Population Growth

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

Boone County, Iowa Demographic Trend

Since 2010, the population of has changed by +0.9%%.

+0.9%% Growth

Boone County, Iowa Age & Gender Pyramid

Population pyramid for

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


Boone County, Iowa Historical Population Data

YearMedian AgePopulation
202442.426,668
202342.226,669
202242.026,700
202142.226,721
202042.126,381
201941.826,370
201841.826,399
201741.426,381
201641.126,411
201541.326,401
201441.126,326
201340.726,310
201240.926,324
201140.826,380
201040.226,424

Boone County, Iowa Age Group Breakdown (2024)

Age CohortPercentage
Under 55.3%
5–1715.8%
18–247.3%
25–3412.1%
35–5425.3%
55–6414.3%
65+20.0%

Dependency Ratios for Boone County, Iowa

Total Dependency Ratio:
69.5
Youth Dependency:
35.7
Old-Age Dependency:
33.8

The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).



Age & Gender FAQs for Boone County, Iowa

The median age in Boone County, Iowa is 42.4 years.

According to latest Census data, the total population of Boone County, Iowa is 26,668.

In Boone County, Iowa, seniors (ages 65+) make up 20.0% of the population, while children under 18 represent 15.8%.

Based on historical data since 2010, the population in Boone County, Iowa is aging.
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