What are the schools like in Union Mill, VA?

Union Mill is served primarily by Fairfax County Public Schools. The district operates 141 elementary schools, 24 middle schools, and 28 high schools with a student-to-teacher ratio of 13.3:1.

What is the median household income in Union Mill?

The median household income in Union Mill, VA is $238,667 according to the most recent US Census American Community Survey 5-year estimates. The unemployment rate is 0.4%.

What is the weather like in Union Mill, VA?

Union Mill has an average high temperature of 42.4°F in January and 87.5°F in July. Annual precipitation averages 47.1 inches and annual snowfall averages 18.5 inches.

Union Mill, VA Cost of Living, Crime & Is It a Good Place to Live? (2026)

Q: Is Union Mill, VA affordable or expensive?

Union Mill's cost of living index is 109, where 100 represents the national average. This means Union Mill is 9% more expensive than the average US city. The median home value is $907,200 and the median rent is $2,516 per month.

Q: What is the crime rate in Union Mill, VA?

Union Mill has a violent crime rate of 113.0 incidents per 100,000 residents and a property crime rate of 1530.7 per 100,000. The national average violent crime rate is approximately 380 per 100,000.

Is Union Mill, VA a Good Place to Live?

Union Mill is a small town of 4,302 in Virginia, with a median household income of $238,667 and a 0.4% unemployment rate. Its cost of living index is 109 (US average = 100), which is 9% above the national average.

Strengths: Union Mill stands out for solid school ratings (A), a well-educated population.

Trade-offs: Potential downsides include high home prices, longer commutes. Whether Union Mill is right for you depends on your priorities — the full breakdown is below.

All Union Mill city data on this page comes from official government sources — the US Census Bureau, FBI, NCES, BEA, and NOAA — updated annually.

Cost of Living

Index: 108.6

Union Mill's overall cost of living index is 108.6, where 100 represents the US national average. Living in Union Mill costs roughly 9% more than the average American city.

Metric	Union Mill, VA	National Avg
Median Home Value	$907,200	$244,900
Median Monthly Rent	$2,516	$1,163
Homeownership Rate	91.9%	65.9%
Median Household Income	$238,667	$74,755

Crime & Safety

Very Safe

Union Mill's violent crime rate is 113.0 per 100,000 residents — 70% lower than the national average of ~380 per 100,000.

Violent Crime

113.0 /100k

Property Crime

1530.7 /100k

Vertical marker = national average. Source: FBI UCR Program.

Schools & Education

Union Mill is served primarily by Fairfax County Public Schools. The student-to-teacher ratio is 13.3:1 (better than the national average of ~16:1).

Metric	Union Mill, VA	National Avg
School District	Fairfax County Public Schools	—
Elementary Schools	141	—
Middle Schools	24	—
High Schools	28	—
Student/Teacher Ratio	13.3:1	16:1
Bachelor's Degree or Higher	76.1%	35.4%
High School Diploma or Higher	97.4%	91.1%

Weather & Climate

Union Mill sees average highs of 42.4°F in January and 87.5°F in July, with 47.1 inches of annual precipitation and 18.5 inches of snow per year.

Metric	Union Mill, VA
Average High — January	42.4°F
Average High — July	87.5°F
Annual Precipitation	47.1"
Annual Snowfall	18.5"

Demographics

Metric	Union Mill, VA	National Avg
Population	4,302	—
Median Age	43.2	38.9
Unemployment Rate	0.4%	3.7%
Avg Commute Time	34.1 min	26 min
White (non-Hispanic)	50.7%	59.3%
Black or African American	0.8%	13.6%
Hispanic or Latino	6.6%	18.9%
Asian	39.1%	6.3%
Under 18	23.7%	22.2%
65 and over	18.0%	16.8%

Nearby Cities

Clifton, VA 1 mi Fairfax Station, VA 3 mi Braddock, VA 3 mi Yorkshire, VA 3 mi Fair Lakes, VA 4 mi

ZIP Codes in Union Mill

Union Mill, VA is covered by 1 ZIP code:

20124

Union Mill vs Other Cities

Union Mill, VA vs Clifton, VA Union Mill, VA vs Fairfax Station, VA Union Mill, VA vs Braddock, VA Union Mill, VA vs Yorkshire, VA Union Mill, VA vs Fair Lakes, VA

Frequently Asked Questions

Is Union Mill, VA affordable or expensive?

Union Mill's cost of living index is 109, where 100 is the national average. That puts Union Mill roughly 9% above the national average in cost. The median home price is $907,200 and median rent is $2,516/month.

What is the crime rate in Union Mill, VA?

Union Mill's violent crime rate is 113.0 per 100,000 residents — the national average is ~380 per 100,000. Property crime is 1530.7 per 100,000 (national avg ~2,100). Data from the FBI Uniform Crime Reporting Program.

What are the schools like in Union Mill?

Public schools in Union Mill are operated by Fairfax County Public Schools. The district has 141 elementary, 24 middle, and 28 high schools. The student-to-teacher ratio is 13.3:1. 76.1% of adults 25+ hold a bachelor's degree or higher.

Is Union Mill, VA a good place to live?

Union Mill, VA has a population of 4,302, a median household income of $238,667, and an unemployment rate of 0.4%. Whether it's right for you depends on your priorities — use the compare tool above to stack it against another city you're considering.

What is the weather like in Union Mill?

Union Mill averages 42.4°F in January and 87.5°F in July. Annual rainfall is 47.1 inches with about 18.5 inches of snow per year. Based on NOAA 30-year climate normals (1991–2020).

What ZIP codes are in Union Mill?

Union Mill, VA is covered by 1 ZIP code: 20124.

What is the population of Union Mill?

The population of Union Mill, Virginia is 4,302 with a median age of 43.2. Source: US Census ACS 5-Year Estimates.

What are the pros and cons of living in Union Mill?

Key numbers for living in Union Mill: cost of living index 109 (100 = US average), median home $907,200, median household income $238,667, crime index 47 (100 = US average, lower is safer), schools rated A. Whether these are benefits or drawbacks depends on where you're coming from — compare Union Mill side by side with your current city to see the trade-offs.