Spokane County, Washington Age & Gender Statistics (2024)

Total Population

549,056

Median Age

38.5

Male Median

37.7

Female Median

39.4

Spokane County, Washington Population Growth

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

Spokane County, Washington Demographic Trend

Since 2010, the population of has changed by +19.0%%.

+19.0%% Growth

Spokane County, Washington Age & Gender Pyramid

Population pyramid for

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


Spokane County, Washington Historical Population Data

YearMedian AgePopulation
202438.5549,056
202338.2544,323
202238.0538,711
202137.9531,477
202037.8513,402
201937.6505,505
201837.5497,875
201737.4490,764
201637.3485,859
201537.2480,832
201437.1476,950
201336.9473,832
201236.8470,375
201136.8466,497
201036.6461,262

Spokane County, Washington Age Group Breakdown (2024)

Age CohortPercentage
Under 55.5%
5–1716.0%
18–248.9%
25–3414.8%
35–5425.1%
55–6412.2%
65+17.4%

Dependency Ratios for Spokane County, Washington

Total Dependency Ratio:
63.8
Youth Dependency:
35.3
Old-Age Dependency:
28.5

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



Age & Gender FAQs for Spokane County, Washington

The median age in Spokane County, Washington is 38.5 years.

According to latest Census data, the total population of Spokane County, Washington is 549,056.

In Spokane County, Washington, seniors (ages 65+) make up 17.4% of the population, while children under 18 represent 16.0%.

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