Dallas County, Iowa Age & Gender Statistics (2024)

Total Population

107,968

Median Age

36.1

Male Median

35.5

Female Median

36.7

Dallas County, Iowa Population Growth

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

Dallas County, Iowa Demographic Trend

Since 2010, the population of has changed by +74.9%%.

+74.9%% Growth

Dallas County, Iowa Age & Gender Pyramid

Population pyramid for

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


Dallas County, Iowa Historical Population Data

YearMedian AgePopulation
202436.1107,968
202335.8104,136
202235.6100,367
202135.596,604
202035.490,418
201935.487,099
201835.384,002
201735.180,864
201635.078,074
201534.774,892
201434.672,124
201334.469,526
201234.366,997
201134.264,383
201034.361,714

Dallas County, Iowa Age Group Breakdown (2024)

Age CohortPercentage
Under 56.7%
5–1719.8%
18–247.5%
25–3414.0%
35–5429.0%
55–6410.2%
65+12.9%

Dependency Ratios for Dallas County, Iowa

Total Dependency Ratio:
65.1
Youth Dependency:
43.8
Old-Age Dependency:
21.2

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



Age & Gender FAQs for Dallas County, Iowa

The median age in Dallas County, Iowa is 36.1 years.

According to latest Census data, the total population of Dallas County, Iowa is 107,968.

In Dallas County, Iowa, seniors (ages 65+) make up 12.9% of the population, while children under 18 represent 19.8%.

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