Yamhill County, OR population age distribution
A complete breakdown of Yamhill 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 | 5,855 | 5.47% |
5 to 9 years | 6,561 | 6.13% |
10 to 14 years | 6,938 | 6.48% |
15 to 19 years | 7,787 | 7.28% |
20 to 24 years | 7,305 | 6.83% |
25 to 29 years | 6,466 | 6.04% |
30 to 34 years | 7,045 | 6.58% |
35 to 39 years | 7,009 | 6.55% |
40 to 44 years | 6,876 | 6.42% |
45 to 49 years | 6,423 | 6% |
50 to 54 years | 6,538 | 6.11% |
55 to 59 years | 6,752 | 6.31% |
60 to 64 years | 6,900 | 6.45% |
65 to 69 years | 6,560 | 6.13% |
70 to 74 years | 4,660 | 4.35% |
75 to 79 years | 3,445 | 3.22% |
80 to 84 years | 1,716 | 1.6% |
85 years and over | 2,188 | 2.04% |
TABLE OF CONTENTS
Yamhill County, OR population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The largest age group in Yamhill County, OR was for the group of age 15-19 years with a population of 7,787 (7.28%), according to the 2021 American Community Survey.
At the same time, the smallest age group in Yamhill County, OR was the 80-84 years with a population of 1,716 (1.60%).
Yamhill County, OR population by age cohort
To better understand the age distribution of Yamhill 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

Here's the population for each of the three cohorts.
Age Group | Population | % of Total Population |
---|---|---|
Under 18 years | 23,659 | 22.11% |
18 to 64 years | 64,796 | 60.54% |
85 years and over | 18,569 | 17.35% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Yamhill County's population under 18 was 22.11%, compared to the 22.51% nationwide.
- Yamhill County's working population (between 18 and 64) was 60.54%, compared to 61.45% nationwide.
- Yamhill County's elderly or the senior population (over 65 age) was 17.35% as compared to 16.04% nationwide.
Yamhill County, OR population pyramid
Population pyramid for Yamhill 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 Yamhill County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Yamhill County, OR, is 28.0.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Yamhill County, OR, is 26.9.
- Total dependency ratio for Yamhill County, OR is 54.9.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Yamhill County, OR is 3.7.

Here's the Yamhill County, OR's male and female population across different age groups:
Age Group | Population(Male) | Population(Female) | Total Population |
---|---|---|---|
Under 5 years | 2,970 | 2,885 | 5,855 |
5 to 9 years | 3,188 | 3,373 | 6,561 |
10 to 14 years | 3,867 | 3,071 | 6,938 |
15 to 19 years | 3,969 | 3,818 | 7,787 |
20 to 24 years | 3,720 | 3,585 | 7,305 |
25 to 29 years | 3,322 | 3,144 | 6,466 |
30 to 34 years | 3,704 | 3,341 | 7,045 |
35 to 39 years | 3,612 | 3,397 | 7,009 |
40 to 44 years | 3,575 | 3,301 | 6,876 |
45 to 49 years | 3,415 | 3,008 | 6,423 |
50 to 54 years | 3,391 | 3,147 | 6,538 |
55 to 59 years | 3,620 | 3,132 | 6,752 |
60 to 64 years | 3,119 | 3,781 | 6,900 |
65 to 69 years | 3,127 | 3,433 | 6,560 |
70 to 74 years | 2,192 | 2,468 | 4,660 |
75 to 79 years | 1,516 | 1,929 | 3,445 |
80 to 84 years | 707 | 1,009 | 1,716 |
85 years and over | 940 | 1,248 | 2,188 |
Things to know
What is the population of Yamhill County, OR under 18?
Yamhill County's population under the age of 18 is 23,659, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 22.11% of the total resident population of Yamhill County, OR.
What is the aging population in Yamhill County, OR?
Yamhill County's population aged 65 years and above was 18,569. As per the U.S. Census Bureau's American Community Survey, this population is 17.35% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates