Sullivan County, Indiana Age & Gender Statistics (2024)

Total Population

20,780

Median Age

41.7

Male Median

40.1

Female Median

44.8

Sullivan County, Indiana Population Growth

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

Sullivan County, Indiana Demographic Trend

Since 2010, the population of has changed by -3.4%%.

-3.4%% Growth

Sullivan County, Indiana Age & Gender Pyramid

Population pyramid for

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


Sullivan County, Indiana Historical Population Data

YearMedian AgePopulation
202441.720,780
202341.320,766
202240.920,791
202140.620,814
202041.320,647
201941.020,730
201841.020,792
201741.420,900
201641.021,026
201540.821,111
201441.021,227
201339.921,321
201239.421,379
201139.121,484
201039.121,520

Sullivan County, Indiana Age Group Breakdown (2024)

Age CohortPercentage
Under 54.9%
5–1713.9%
18–247.7%
25–3413.6%
35–5427.3%
55–6413.7%
65+18.9%

Dependency Ratios for Sullivan County, Indiana

Total Dependency Ratio:
60.6
Youth Dependency:
30.2
Old-Age Dependency:
30.4

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



Age & Gender FAQs for Sullivan County, Indiana

The median age in Sullivan County, Indiana is 41.7 years.

According to latest Census data, the total population of Sullivan County, Indiana is 20,780.

In Sullivan County, Indiana, seniors (ages 65+) make up 18.9% of the population, while children under 18 represent 13.9%.

Based on historical data since 2010, the population in Sullivan County, Indiana is aging.
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