Kootenai County, Idaho Age & Gender Distribution (2024)
Population distribution by age and gender for Kootenai County, Idaho
Kootenai County, Idaho Age & Gender Statistics (2024)
Total Population
181,996
Median Age
40.9
Male Median
40.1
Female Median
42.2
Kootenai County, Idaho Population Growth

Kootenai County, Idaho Demographic Trend
Since 2010, the population of has changed by +35.0%%.
+35.0%% Growth
Kootenai County, Idaho Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Kootenai County, Idaho Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 40.9 | 181,996 |
| 2023 | 40.8 | 177,736 |
| 2022 | 40.7 | 173,396 |
| 2021 | 40.4 | 168,317 |
| 2020 | 40.3 | 161,676 |
| 2019 | 40.2 | 157,322 |
| 2018 | 40.2 | 153,605 |
| 2017 | 39.7 | 150,128 |
| 2016 | 39.7 | 147,716 |
| 2015 | 39.4 | 145,046 |
| 2014 | 39.4 | 142,783 |
| 2013 | 39.2 | 140,785 |
| 2012 | 39.1 | 139,083 |
| 2011 | 38.7 | 137,178 |
| 2010 | 38.5 | 134,851 |
Kootenai County, Idaho Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.4% |
| 5–17 | 16.9% |
| 18–24 | 7.2% |
| 25–34 | 12.5% |
| 35–54 | 24.7% |
| 55–64 | 13.1% |
| 65+ | 20.1% |
Dependency Ratios for Kootenai County, Idaho
- Total Dependency Ratio:
- 73.7
- Youth Dependency:
- 38.8
- Old-Age Dependency:
- 34.9
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Kootenai County, Idaho
The median age in Kootenai County, Idaho is 40.9 years.
According to latest Census data, the total population of Kootenai County, Idaho is 181,996.
In Kootenai County, Idaho, seniors (ages 65+) make up 20.1% of the population, while children under 18 represent 16.9%.
Based on historical data since 2010, the population in Kootenai County, Idaho is aging.