Union MillVA
A town of 4,484.
What should you know before moving to Union Mill?
Union Mill's standout: the median household earns $250K. Overall it grades A, 50th of 249 graded towns in Virginia. It is healthier than 97% of U.S. towns. 71% of adults 25 and older hold a bachelor’s degree or more in Union Mill, above both Virginia’s towns (44%) and U.S. towns (29%). Only 6 of the 253 Virginia towns we compare have a higher median household income than Union Mill. The biggest park or preserve is Braddock Park, at 59 acres.
What makes Union Mill stand out
Where Union Mill beats most towns.
99% of working residents leave Union Mill for work
Where Union Mill’s working residents go each day. Line width shows the share.
Census LEHD 2023
How Union Mill grades
Each subject compared with towns across the country (schools within Virginia), ordered by how far Union Mill is from typical.
How TownRatings grades towns →
White House and 243 more within 40 miles
Museums, parks, gardens and other places to visit around Union Mill. Close and well known come first.
Big draw20 mi National park siteWhite House311K visitors a year
Big draw20 mi National MemorialWashington Monument204K visitors a year
Big draw18 mi LandmarkArlington National Cemetery
Big draw19 mi LandmarkUnited States Triumphal Arch
Big draw20 mi MuseumSmithsonian Institution30.0M visitors a year
Big draw19 mi National MemorialLincoln Memorial7.7M visitors a yearPhoto credits
White House: This image or media was taken or created by Matt H. Wade. To see his entire port, CC BY-SA 3.0 · Washington Monument: Oren Rozen, CC BY-SA 4.0 · Arlington National Cemetery: Protoant, Public domain · United States Triumphal Arch: Hstoops, CC0 · Smithsonian Institution: Highsmith, Carol M., 1946-, photographer, Public domain · Lincoln Memorial: Aerial_view_of_Lincoln_Memorial_-_east_side.jpg: Carol M. Highsmith derivative w, Public domain
Moving to Union Mill: who provides what
Union Mill is unincorporated, so Fairfax County and regional agencies provide most services.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Sep 30, 2026.
The data
Ordered by what stands out in Union Mill.
Union Mill has less tooth loss than most of Virginia and sends most of its workers to Washington and beyond, but it has homes that cost more against local pay than most of Virginia.
For health, Union Mill earns an A+
Its widest gap with Virginia is tooth loss: 3.6% of those 65+ have lost all their teeth, against 11.1% statewide. Against the 436 U.S. towns with household incomes like Union Mill’s, it is less healthy than 67%: its national edge comes with its incomes.
In Union Mill, 19% of adults have been diagnosed with depression. On the CDC’s 32 measures, Union Mill is ahead of Virginia on 23 and behind on 1. Two figures for adults locally: 11% report frequent mental distress, 7% smoke cigarettes.
| Union Mill | Virginia towns | U.S. towns | |
|---|---|---|---|
| Obesity (CDC PLACES) | 22% | 34% | 35% |
| Frequent mental distress (CDC PLACES) | 11% | 16% | 17% |
| Smoke cigarettes (CDC PLACES) | 7% | 12% | 14% |
| Frequent physical distress (CDC PLACES) | 9.8% | 12% | 14% |
| What stands out | Union Mill | VA |
|---|---|---|
| Fewer older adults who have lost all their teeth | 3.6% | 11.1% |
| Fewer adults facing food insecurity | 5.7% | 13.1% |
| More adults who have had cancer | 9.2% | 7.7% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Union Mill’s public schools outperform 74% of Virginia districts
Its two schools are below. The largest public high school is Centreville High, with 2,347 students. Public schools: the Fairfax County Public Schools.
| School | Level | Students | Letter |
|---|---|---|---|
| Liberty MiddleLargest public middle schoolGrades 7–8 | Grades 7–8 | 913 | B+ |
| Centreville HighLargest public high schoolGrades 9–12 | Grades 9–12 | 2,347 | A |
NCES · EDFacts · graded within VA on state tests and graduation
Most people working in Union Mill commute elsewhere
Union Mill has 613 jobs for its 2,139 working residents: even if every job went to a resident, most would still commute out. The average commute takes 36.6 minutes, against 27.3 across Virginia.
1.3% of Union Mill working residents work locally. Between 2013 and 2023, jobs here rose by 186, to 613. Its average trip to work is 37 minutes. Half the trips to work are shorter than 12 miles.
| Union Mill | Virginia towns | U.S. towns | |
|---|---|---|---|
| Average trip to work | 37 minutes | 27 minutes | 25 minutes |
| Below the poverty line | 4.4% | 7.7% | 9.6% |
| Working residents who work in town | 1.3% | 5% | 8% |
Where working residents work
Census LEHD 2023 · ACS
In Union Mill, expect four seasons and pleasant summers
In July, afternoons reach 87°; in January, nights fall to 26°, and about 21 inches of snow falls in a winter.
Typical low → high °F
NOAA U.S. Climate Normals, 1991–2020
Conservation land takes up 6.9% of Union Mill
Count the trails in 2 parks and preserves and they come to 3.5 miles. Union Mill’s trail density stands at 0.4 miles per square mile.
| Union Mill | Virginia towns | U.S. towns | |
|---|---|---|---|
| Miles of trail per square mile | 0.4 miles per square mile | 0.7 | 0.4 |
| Conserved land | 6.9% | 4.6% | 4.3% |
| Biggest places to walk | Trails | Acres |
|---|---|---|
| 1. Braddock Park | 0.4 mi | 59 |
| 2. Chapel Road Park | 0.3 mi | 26 |
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
The biggest natural risk in Union Mill is inland flooding, at a moderate overall level
Expected losses in Union Mill break down as 85% from inland flooding and 5% from hurricanes. The town’s FEMA hazard score comes in at 48 of 100.
FEMA National Risk Index · OpenFEMA
The median home in Union Mill sells for about $1.25M
At 7.6 years of the Washington metro’s $127K median household income, the typical home costs more against local pay than in 95% of Virginia towns; that ratio is one input to its C for cost of living.
A home in Union Mill typically sold within 30 days of listing. The share of households in Union Mill who live in a home they own: 95%. Bidding over the asking price: 38% of homes sold locally.
Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center
Everything we know about Union Mill
Colleges nearby
9 within 15 miles of the center of Union Mill
About 6 of every 100 Union Mill residents are enrolled in college, about the same as Virginia.
About Union Mill
Census-designated place in Virginia
Union Mill is a census designated place in Fairfax County, Virginia, United States. As of the 2020 census, Union Mill had a population of 4,997.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 10 sq mi
- Elevation
- 302 ft
Union Mill’s neighbors
5 towns share a border with Union Mill.
It grades higher overall than all 4 graded towns on its borders; Fair Lakes (A) comes closest.
| Town | VA rank | Overall | Cost | Safety | Schools | Health |
|---|---|---|---|---|---|---|
| Union Mill | #50 | A | C | — | B+ | A+ |
| Fairfax Station | #72 | A | D | — | B+ | A+ |
| Braddock | #79 | A | D | — | B+ | A+ |
| Centreville | #85 | A− | C− | — | B+ | A |
| Clifton | — | — | — | — | — | — |
| Fair Lakes | #62 | A | D | — | B+ | A+ |
Union Mill, Fairfax Station, Braddock, Centreville and Fair Lakes report no FBI crime data of their own. Clifton isn’t graded (fewer than 1,000 residents, or not enough data). Compare Union Mill with a neighbor →
Questions about Union Mill
Short answers, built from the data on this page.
Is Union Mill, VA a good place to live?
By most measures, yes. Union Mill grades A overall, better than 91% of U.S. towns and #50 of 249 in Virginia. It grades A+ for health and B+ for schools.
Is Union Mill, VA expensive?
The typical home is worth about $961,000, 133% above the Virginia typical home. Cost of living, which also weighs rents, property taxes and how many households pay 30% or more of their income for housing, grades C.