Multnomah County, Oregon Age & Gender Statistics (2024)

Total Population

801,477

Median Age

38.7

Male Median

38.4

Female Median

39.0

Multnomah County, Oregon Population Growth

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

Multnomah County, Oregon Demographic Trend

Since 2010, the population of has changed by +12.6%%.

+12.6%% Growth

Multnomah County, Oregon Age & Gender Pyramid

Population pyramid for

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


Multnomah County, Oregon Historical Population Data

YearMedian AgePopulation
202438.7801,477
202338.5803,863
202238.2808,098
202137.8810,011
202037.5809,869
201937.2804,606
201837.0798,647
201736.8788,459
201636.7778,193
201536.5768,418
201436.3757,371
201336.1747,641
201235.9737,110
201135.8724,803
201035.8712,036

Multnomah County, Oregon Age Group Breakdown (2024)

Age CohortPercentage
Under 54.6%
5–1713.0%
18–247.7%
25–3418.0%
35–5430.9%
55–6411.0%
65+14.8%

Dependency Ratios for Multnomah County, Oregon

Total Dependency Ratio:
47.8
Youth Dependency:
26.0
Old-Age Dependency:
21.8

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



Age & Gender FAQs for Multnomah County, Oregon

The median age in Multnomah County, Oregon is 38.7 years.

According to latest Census data, the total population of Multnomah County, Oregon is 801,477.

In Multnomah County, Oregon, seniors (ages 65+) make up 14.8% of the population, while children under 18 represent 13.0%.

Based on historical data since 2010, the population in Multnomah County, Oregon is aging.
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