Lake County, Indiana Age & Gender Statistics (2024)

Total Population

500,379

Median Age

39.7

Male Median

38.4

Female Median

40.9

Lake County, Indiana Population Growth

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

Lake County, Indiana Demographic Trend

Since 2010, the population of has changed by +1.2%%.

+1.2%% Growth

Lake County, Indiana Age & Gender Pyramid

Population pyramid for

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


Lake County, Indiana Historical Population Data

YearMedian AgePopulation
202439.7500,379
202339.6498,990
202239.3497,682
202139.2495,925
202039.1485,983
201939.1485,707
201838.7486,849
201738.6488,694
201638.2489,698
201538.1491,596
201437.8493,140
201337.6494,250
201237.3495,230
201137.1495,272
201036.9494,417

Lake County, Indiana Age Group Breakdown (2024)

Age CohortPercentage
Under 55.7%
5–1717.4%
18–248.3%
25–3412.3%
35–5425.3%
55–6413.1%
65+17.9%

Dependency Ratios for Lake County, Indiana

Total Dependency Ratio:
69.6
Youth Dependency:
39.3
Old-Age Dependency:
30.3

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



Age & Gender FAQs for Lake County, Indiana

The median age in Lake County, Indiana is 39.7 years.

According to latest Census data, the total population of Lake County, Indiana is 500,379.

In Lake County, Indiana, seniors (ages 65+) make up 17.9% of the population, while children under 18 represent 17.4%.

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