Union Mill

County:: Fairfax County
County Seat:: No
Area (mi²):: 9.985
State:: Virginia

Union Mill is a CDP located in Fairfax County, Virginia. Union Mill has a 2025 population of 5,378. Union Mill is currently growing at a rate of 7.15% annually and its population has increased by 23.29% since the most recent census, which recorded a population of 4,362 in 2020.

The average household income in Union Mill is $302,844 with a poverty rate of 4.14%. The median age in Union Mill is 45.2 years: 45.9 years for males, and 45 years for females.

Demographics

The racial composition of Union Mill includes 47.83% White, 40.45% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Two or more races

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	2,081	47.83%
Asian	1,760	40.45%
Two or more races	376	8.64%
Other race	95	2.18%
Black or African American	39	0.9%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Union Mill Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Union Mill's average per capita income is $112,647. Household income levels show a median of $245,265. The poverty rate stands at 4.14%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Families	$250,001	$339,687
Married Families	$250,001	-
Households	$245,265	$302,844
Non Families	$53,750	$95,743

$112,647

Average Income

$245,265

Median Household Income

4.14%

Poverty Rate