Washington County, OR population age distributions
A complete breakdown of Washington County's age demographics from 0 to 85 years, distributed across 18 age groups is listed in the table below.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 5 years | 32,949 | 5.5% |
| 5 to 9 years | 35,556 | 5.93% |
| 10 to 14 years | 40,339 | 6.73% |
| 15 to 19 years | 37,156 | 6.2% |
| 20 to 24 years | 36,337 | 6.06% |
| 25 to 29 years | 45,353 | 7.56% |
| 30 to 34 years | 47,946 | 8% |
| 35 to 39 years | 47,142 | 7.86% |
| 40 to 44 years | 45,182 | 7.54% |
| 45 to 49 years | 41,201 | 6.87% |
| 50 to 54 years | 38,112 | 6.36% |
| 55 to 59 years | 34,019 | 5.67% |
| 60 to 64 years | 34,286 | 5.72% |
| 65 to 69 years | 28,576 | 4.77% |
| 70 to 74 years | 22,454 | 3.75% |
| 75 to 79 years | 14,739 | 2.46% |
| 80 to 84 years | 8,530 | 1.42% |
| 85 years and over | 9,664 | 1.61% |
TABLE OF CONTENTS
Washington County, OR population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Washington County, OR population by age group.
The largest age group is 30 to 34 years with a population of 47,946 (8% of the total population).
The largest age group in Washington County, OR was for the group of age 30 to 34 years with a population of 47,946 (8%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Washington County, OR was the 80 to 84 years with a population of 8,530 (1.42%).
Washington County, OR population by age cohort
To better understand the age distribution of Washington County, OR's population, we divided it into the following 3 cohorts:
- Children : Under the age of 18 years
- Adults (working population): Between the age of 18 and 64 years
- Seniors: 65 years and above
FIGURE 2
Washington County, OR population by age cohort
The largest age group was 18 to 64 years with a population of 383,060 (63.89% of the total population).
Washington County, OR population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 132,518 | 22.1% |
| 18 to 64 years | 383,060 | 63.89% |
| 65 years and over | 83,963 | 14% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Washington County 's population under 18 was 22.10%, compared to the 22.11% nationwide.
- Washington County's working population (between 18 and 64) was 63.89%, compared to 61.36% nationwide.
- Washington County's elderly or the senior population (over 65 age) was 14% as compared to 16.53% nationwide.
Washington County, OR population pyramid
Population pyramid for Washington County, OR is charted below using the estimates from U.S. Census Bureau's American Community Survey 5-Year estimates. A wide base suggests population increase, narrow base indicates declining birth rates.
Key stats from our analysis of the Washington County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Washington County, OR, is 26.8.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Washington County, OR, is 20.6.
- Total dependency ratio for Washington County, OR is 47.4.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Washington County, OR is 4.8.
FIGURE 3
Washington County, OR population pyramid
Washington County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Washington County, OR population pyramid
Here's the Washington County, OR's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 16,988 | 15,961 | 32,949 |
| 5 to 9 years | 18,000 | 17,556 | 35,556 |
| 10 to 14 years | 20,992 | 19,347 | 40,339 |
| 15 to 19 years | 19,148 | 18,008 | 37,156 |
| 20 to 24 years | 18,242 | 18,095 | 36,337 |
| 25 to 29 years | 23,272 | 22,081 | 45,353 |
| 30 to 34 years | 24,808 | 23,138 | 47,946 |
| 35 to 39 years | 24,260 | 22,882 | 47,142 |
| 40 to 44 years | 23,129 | 22,053 | 45,182 |
| 45 to 49 years | 20,957 | 20,244 | 41,201 |
| 50 to 54 years | 19,353 | 18,759 | 38,112 |
| 55 to 59 years | 16,827 | 17,192 | 34,019 |
| 60 to 64 years | 16,919 | 17,367 | 34,286 |
| 65 to 69 years | 12,992 | 15,584 | 28,576 |
| 70 to 74 years | 10,430 | 12,024 | 22,454 |
| 75 to 79 years | 6,491 | 8,248 | 14,739 |
| 80 to 84 years | 3,313 | 5,217 | 8,530 |
| 85 years and over | 3,550 | 6,114 | 9,664 |
Things to know
What is the population of Washington County, OR under 18?
Washington County's population under the age of 18 is 132,518, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 22.10% of the total resident population of Washington County, OR.
What is the aging population in Washington County, OR?
Washington County's population aged 65 years and above was 83,963. As per the U.S. Census Bureau's American Community Survey, this population is 14% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates