Kittitas County, Washington Age & Gender Statistics (2024)

Total Population

47,172

Median Age

35.8

Male Median

35.7

Female Median

36.0

Kittitas County, Washington Population Growth

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

Kittitas County, Washington Demographic Trend

Since 2010, the population of has changed by +18.3%%.

+18.3%% Growth

Kittitas County, Washington Age & Gender Pyramid

Population pyramid for

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


Kittitas County, Washington Historical Population Data

YearMedian AgePopulation
202435.847,172
202337.944,736
202236.444,424
202134.344,147
202033.747,097
201933.845,897
201833.144,825
201733.343,726
201633.742,785
201533.042,204
201432.741,705
201332.741,291
201232.440,954
201132.140,461
201032.239,869

Kittitas County, Washington Age Group Breakdown (2024)

Age CohortPercentage
Under 54.1%
5–1712.5%
18–2420.0%
25–3412.3%
35–5421.3%
55–6412.7%
65+17.0%

Dependency Ratios for Kittitas County, Washington

Total Dependency Ratio:
50.9
Youth Dependency:
25.2
Old-Age Dependency:
25.7

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



Age & Gender FAQs for Kittitas County, Washington

The median age in Kittitas County, Washington is 35.8 years.

According to latest Census data, the total population of Kittitas County, Washington is 47,172.

In Kittitas County, Washington, seniors (ages 65+) make up 17.0% of the population, while children under 18 represent 12.5%.

Based on historical data since 2010, the population in Kittitas County, Washington is aging.
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