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

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

Kootenai County, Idaho Demographic Trend

Since 2010, the population of has changed by +35.0%%.

+35.0%% Growth

Kootenai County, Idaho Age & Gender Pyramid

Population pyramid for

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


Kootenai County, Idaho Historical Population Data

YearMedian AgePopulation
202440.9181,996
202340.8177,736
202240.7173,396
202140.4168,317
202040.3161,676
201940.2157,322
201840.2153,605
201739.7150,128
201639.7147,716
201539.4145,046
201439.4142,783
201339.2140,785
201239.1139,083
201138.7137,178
201038.5134,851

Kootenai County, Idaho Age Group Breakdown (2024)

Age CohortPercentage
Under 55.4%
5–1716.9%
18–247.2%
25–3412.5%
35–5424.7%
55–6413.1%
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.
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