Jo Daviess County, Illinois Age & Gender Statistics (2024)

Total Population

21,851

Median Age

51.5

Male Median

49.7

Female Median

52.9

Jo Daviess County, Illinois Population Growth

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

Jo Daviess County, Illinois Demographic Trend

Since 2010, the population of has changed by -3.9%%.

-3.9%% Growth

Jo Daviess County, Illinois Age & Gender Pyramid

Population pyramid for

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


Jo Daviess County, Illinois Historical Population Data

YearMedian AgePopulation
202451.521,851
202350.921,918
202250.821,942
202150.521,995
202050.421,429
201949.921,588
201849.721,834
201749.422,046
201648.622,186
201548.222,397
201448.222,427
201347.422,602
201247.222,663
201146.922,709
201046.622,728

Jo Daviess County, Illinois Age Group Breakdown (2024)

Age CohortPercentage
Under 54.0%
5–1714.2%
18–245.8%
25–348.9%
35–5421.6%
55–6415.6%
65+29.9%

Dependency Ratios for Jo Daviess County, Illinois

Total Dependency Ratio:
92.7
Youth Dependency:
35.0
Old-Age Dependency:
57.7

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



Age & Gender FAQs for Jo Daviess County, Illinois

The median age in Jo Daviess County, Illinois is 51.5 years.

According to latest Census data, the total population of Jo Daviess County, Illinois is 21,851.

In Jo Daviess County, Illinois, seniors (ages 65+) make up 29.9% of the population, while children under 18 represent 14.2%.

Based on historical data since 2010, the population in Jo Daviess County, Illinois is aging.
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