Umatilla County, Oregon Age & Gender Statistics (2024)

Total Population

79,940

Median Age

36.9

Male Median

36.0

Female Median

38.5

Umatilla County, Oregon Population Growth

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

Umatilla County, Oregon Demographic Trend

Since 2010, the population of has changed by +6.9%%.

+6.9%% Growth

Umatilla County, Oregon Age & Gender Pyramid

Population pyramid for

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


Umatilla County, Oregon Historical Population Data

YearMedian AgePopulation
202436.979,940
202336.780,087
202236.979,904
202136.879,509
202036.777,319
201936.577,129
201836.376,898
201736.176,736
201635.976,582
201536.076,738
201435.976,645
201335.776,306
201235.775,846
201135.775,344
201035.674,804

Umatilla County, Oregon Age Group Breakdown (2024)

Age CohortPercentage
Under 56.1%
5–1718.5%
18–248.9%
25–3414.4%
35–5424.5%
55–6411.3%
65+16.4%

Dependency Ratios for Umatilla County, Oregon

Total Dependency Ratio:
69.4
Youth Dependency:
41.6
Old-Age Dependency:
27.7

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



Age & Gender FAQs for Umatilla County, Oregon

The median age in Umatilla County, Oregon is 36.9 years.

According to latest Census data, the total population of Umatilla County, Oregon is 79,940.

In Umatilla County, Oregon, seniors (ages 65+) make up 16.4% of the population, while children under 18 represent 18.5%.

Based on historical data since 2010, the population in Umatilla County, Oregon has remained stable.
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