Benton County, Iowa Age & Gender Statistics (2024)

Total Population

25,724

Median Age

43.1

Male Median

42.3

Female Median

44.0

Benton County, Iowa Population Growth

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

Benton County, Iowa Demographic Trend

Since 2010, the population of has changed by -1.4%%.

-1.4%% Growth

Benton County, Iowa Age & Gender Pyramid

Population pyramid for

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


Benton County, Iowa Historical Population Data

YearMedian AgePopulation
202443.125,724
202343.325,698
202243.025,652
202143.125,654
202043.125,558
201942.625,636
201842.625,626
201742.125,646
201641.825,720
201541.425,803
201440.925,895
201340.425,971
201240.426,044
201139.926,089
201040.026,098

Benton County, Iowa Age Group Breakdown (2024)

Age CohortPercentage
Under 55.6%
5–1717.3%
18–247.1%
25–3410.6%
35–5424.4%
55–6415.3%
65+19.8%

Dependency Ratios for Benton County, Iowa

Total Dependency Ratio:
74.4
Youth Dependency:
39.9
Old-Age Dependency:
34.5

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



Age & Gender FAQs for Benton County, Iowa

The median age in Benton County, Iowa is 43.1 years.

According to latest Census data, the total population of Benton County, Iowa is 25,724.

In Benton County, Iowa, seniors (ages 65+) make up 19.8% of the population, while children under 18 represent 17.3%.

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