Des Moines County, Iowa Age & Gender Statistics (2024)

Total Population

38,487

Median Age

42.3

Male Median

41.5

Female Median

43.1

Des Moines County, Iowa Population Growth

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

Des Moines County, Iowa Demographic Trend

Since 2010, the population of has changed by -4.4%%.

-4.4%% Growth

Des Moines County, Iowa Age & Gender Pyramid

Population pyramid for

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


Des Moines County, Iowa Historical Population Data

YearMedian AgePopulation
202442.338,487
202342.238,597
202242.138,824
202142.739,069
202042.739,227
201942.939,386
201842.639,600
201742.539,876
201642.240,114
201542.140,208
201441.740,265
201341.840,301
201241.840,268
201141.740,255
201041.540,266

Des Moines County, Iowa Age Group Breakdown (2024)

Age CohortPercentage
Under 55.9%
5–1716.3%
18–247.5%
25–3411.9%
35–5423.4%
55–6413.7%
65+21.3%

Dependency Ratios for Des Moines County, Iowa

Total Dependency Ratio:
77.0
Youth Dependency:
39.4
Old-Age Dependency:
37.6

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



Age & Gender FAQs for Des Moines County, Iowa

The median age in Des Moines County, Iowa is 42.3 years.

According to latest Census data, the total population of Des Moines County, Iowa is 38,487.

In Des Moines County, Iowa, seniors (ages 65+) make up 21.3% of the population, while children under 18 represent 16.3%.

Based on historical data since 2010, the population in Des Moines County, Iowa has remained stable.
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