Lake County, Indiana Age & Gender Distribution (2024)
Population distribution by age and gender for Lake County, Indiana
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

Lake County, Indiana Demographic Trend
Since 2010, the population of has changed by +1.2%%.
+1.2%% Growth
Lake County, Indiana Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Lake County, Indiana Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.7 | 500,379 |
| 2023 | 39.6 | 498,990 |
| 2022 | 39.3 | 497,682 |
| 2021 | 39.2 | 495,925 |
| 2020 | 39.1 | 485,983 |
| 2019 | 39.1 | 485,707 |
| 2018 | 38.7 | 486,849 |
| 2017 | 38.6 | 488,694 |
| 2016 | 38.2 | 489,698 |
| 2015 | 38.1 | 491,596 |
| 2014 | 37.8 | 493,140 |
| 2013 | 37.6 | 494,250 |
| 2012 | 37.3 | 495,230 |
| 2011 | 37.1 | 495,272 |
| 2010 | 36.9 | 494,417 |
Lake County, Indiana Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.7% |
| 5–17 | 17.4% |
| 18–24 | 8.3% |
| 25–34 | 12.3% |
| 35–54 | 25.3% |
| 55–64 | 13.1% |
| 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.