Fairfax County, VA population age distributions
A complete breakdown of Fairfax 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 | 69,144 | 6.04% |
| 5 to 9 years | 72,758 | 6.35% |
| 10 to 14 years | 76,465 | 6.68% |
| 15 to 19 years | 74,988 | 6.55% |
| 20 to 24 years | 69,456 | 6.06% |
| 25 to 29 years | 72,706 | 6.35% |
| 30 to 34 years | 76,486 | 6.68% |
| 35 to 39 years | 85,093 | 7.43% |
| 40 to 44 years | 81,049 | 7.08% |
| 45 to 49 years | 80,758 | 7.05% |
| 50 to 54 years | 79,314 | 6.92% |
| 55 to 59 years | 75,943 | 6.63% |
| 60 to 64 years | 68,960 | 6.02% |
| 65 to 69 years | 53,579 | 4.68% |
| 70 to 74 years | 43,364 | 3.79% |
| 75 to 79 years | 29,964 | 2.62% |
| 80 to 84 years | 18,136 | 1.58% |
| 85 years and over | 17,191 | 1.5% |
TABLE OF CONTENTS
Fairfax County, VA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Fairfax County, VA population by age group.
The largest age group is 35 to 39 years with a population of 85,093 (7.43% of the total population).
The largest age group in Fairfax County, VA was for the group of age 35 to 39 years with a population of 85,093 (7.43%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Fairfax County, VA was the 85 years and over with a population of 17,191 (1.50%).
Fairfax County, VA population by age cohort
To better understand the age distribution of Fairfax County, VA'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
Fairfax County, VA population by age cohort
The largest age group was 18 to 64 years with a population of 718,182 (62.70% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Fairfax County 's population under 18 was 23.13%, compared to the 22.11% nationwide.
- Fairfax County's working population (between 18 and 64) was 62.70%, compared to 61.36% nationwide.
- Fairfax County's elderly or the senior population (over 65 age) was 14.16% as compared to 16.53% nationwide.
Fairfax County, VA population pyramid
Population pyramid for Fairfax County, VA 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 Fairfax County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Fairfax County, VA, is 28.6.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Fairfax County, VA, is 21.2.
- Total dependency ratio for Fairfax County, VA is 49.8.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Fairfax County, VA is 4.7.
FIGURE 3
Fairfax County, VA population pyramid
Fairfax County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Fairfax County, VA population pyramid
Here's the Fairfax County, VA's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 35,426 | 33,718 | 69,144 |
| 5 to 9 years | 38,585 | 34,173 | 72,758 |
| 10 to 14 years | 38,256 | 38,209 | 76,465 |
| 15 to 19 years | 38,796 | 36,192 | 74,988 |
| 20 to 24 years | 35,297 | 34,159 | 69,456 |
| 25 to 29 years | 37,567 | 35,139 | 72,706 |
| 30 to 34 years | 39,198 | 37,288 | 76,486 |
| 35 to 39 years | 41,692 | 43,401 | 85,093 |
| 40 to 44 years | 41,596 | 39,453 | 81,049 |
| 45 to 49 years | 40,271 | 40,487 | 80,758 |
| 50 to 54 years | 39,599 | 39,715 | 79,314 |
| 55 to 59 years | 37,366 | 38,577 | 75,943 |
| 60 to 64 years | 35,025 | 33,935 | 68,960 |
| 65 to 69 years | 25,778 | 27,801 | 53,579 |
| 70 to 74 years | 20,592 | 22,772 | 43,364 |
| 75 to 79 years | 14,443 | 15,521 | 29,964 |
| 80 to 84 years | 7,553 | 10,583 | 18,136 |
| 85 years and over | 6,100 | 11,091 | 17,191 |
Things to know
What is the population of Fairfax County, VA under 18?
Fairfax County's population under the age of 18 is 264,938, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 23.13% of the total resident population of Fairfax County, VA.
What is the aging population in Fairfax County, VA?
Fairfax County's population aged 65 years and above was 162,234. As per the U.S. Census Bureau's American Community Survey, this population is 14.16% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates