Fairfax County, VA Population

Overview

1.15 million

Total Population

38.3

Median age

50.11%

Female population %

99.6:100

Gender ratio (M:F)

35-39 years

Largest age group

49.5

Total dependency ratio

White

Largest racial group

188,036

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Fairfax County's population is young compared to the rest of the country:

The median age in Fairfax County is 38.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Fairfax County's population under 18 was 23.54%, compared to the 22.51% nationwide.
Fairfax County's elderly or the senior population (over 65 age) was 13.62% as compared to 16.04% nationwide.
Of the total population in Fairfax County, 19.48% were under the age of 15, 18.69% aged 15 to 29, 48.21% aged 30 to 64, 12.24% aged 65 to 84, and 1.38% were 85 years of age and older.

There are 2,445 more females than males in Fairfax County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.11% females and 49.89% males in Fairfax County, VA.
The Fairfax County, VA gender ratio is 99.6:100 i.e. 99.6 men to 100 women (0.996).
For male population, the largest age group is 35-39 years with a population of 42,863.
For the female population, the largest age group is 35-39 years with a population of 44,606.

Fairfax County's population has become increasingly diverse:

Racial distribution of Fairfax County population: 56.64% are White, 9.82% are Black or African American, 0.36% are American Indian and Alaska Native, 20.05% are Asian, 0.06% are Native Hawaiian and other Pacific Islander, 5.46% are some other race and 7.60% are multiracial.
Fairfax County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 188,036 is Hispanic or Latino (of any race), and 958,789 (83.60% of the total population) is Non-Hispanic.
The largest racial group in Fairfax County is White with a population of 649,59 (56.64% of the total population).

Fairfax County's population has already reached its peak and is showing a trend of decline:

The peak population was 1,152,359 in the year 2019
From 2000 to 2010, Fairfax County's population increased by 111,082 (11.39%), as compared to the national growth of 9.63%.
From 2010 to 2020, Fairfax County's population increased by 62,393 (5.74%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Fairfax County's population was lowest in year 2000 at 975,083.