Housing data for Union Mill, VA
Union Mill, VA has an estimated 4,484 residents and 1,440 homes (US Census Bureau, 2020–2024 American Community Survey).
It is an unincorporated community in Fairfax County.
5.2% of households rent.
The median gross rent is $2,365 a month.
Figures last updated on .
- Residents
- 4,484 (±668)
- Housing units
- 1,440 (±195)
- Households that rent
- 5.2%
- Median gross rent
- $2,365
What stands out in Union Mill
Households that rent: 5.2% (±3.5 points) in Union Mill, lower than in Fairfax County (31.4%).
Homes in buildings of 5 or more units: 0.0% (±4.7 points) in Union Mill, lower than in Fairfax County (28.9%).
Homes heated by fuel oil: 8.3% (±3.8 points) in Union Mill, higher than in Fairfax County (1.2%).
Households that moved in since 2020: 12.3% (±6.3 points) in Union Mill, lower than in Fairfax County (26.4%).
Housing in Union Mill at a glance
- Median rent: $2,365 median gross rent a month (Small sample: wide margin of error)
- Rent burden: 42.1% of renters pay 30% or more of income (Small sample: wide margin of error)
- Renters and owners: 5.2% of households rent (Small sample: wide margin of error)
- Income and affordability: $250,000 or more median household income
- Home values: $961,400 median home value
- Homeowner costs: $3,842 median monthly cost with a mortgage
- Property taxes: $10,000 or more median real estate taxes a year
- Types of homes: 0.0% of homes are in buildings of 5 or more units
- Bedrooms: 95.6% of homes have 3 or more bedrooms (Small sample: wide margin of error)
- Age of homes: 27.0% of homes were built before 1980
- Vacancy rate: 0.0% rental vacancy rate (Small sample: wide margin of error)
- Heating fuel: 47.3% heat with utility gas
- Commute and cars: 36.6 minutes average trip to work
- How long people stay: 12.3% moved in since 2020 (Small sample: wide margin of error)
- Crowding and facilities: 0.6% of homes have more than 1 person per room (Small sample: wide margin of error)
- Fair Market Rent: $2,770 Small Area FMR, 2 bedrooms (ZIP 20124)
Union Mill against Fairfax County, its state and the nation
| Union Mill | Fairfax County | Virginia | United States | |
|---|---|---|---|---|
| Residents | 4,484 (±668) | 1,147,837 (exact) | 8,705,170 (exact) | 334,922,499 |
| Housing units | 1,440 (±195) | 430,047 (±184) | 3,684,756 (±486) | 143,775,355 |
| Households that rent | 5.2% (±3.5 points) | 31.4% (±0.5 points) | 32.7% (±0.3 points) | 34.8% |
| Median gross rent | $2,365 (±$1,707) | $2,276 (±$15) | $1,579 (±$8) | $1,413 |
| Median household income | $250,000 or more | $153,637 (±$1,635) | $93,170 (±$458) | $80,734 |
| Median home value | $961,400 (±$50,233) | $732,800 (±$4,766) | $383,700 (±$1,024) | $332,700 |
| Median real estate taxes (a year) | $10,000 or more | $7,368 (±$57) | $2,790 (±$10) | $3,119 |
| Built before 1980 | 27.0% (±7.8 points) | 43.5% (±0.6 points) | 43.5% (±0.2 points) | 49.7% |
| Average commute | 36.6 minutes (±8.9) | 28.9 minutes (±0.3) | 27.3 minutes (±0.1) | 26.4 minutes |
| Households with broadband | 100.0% (±2.8 points) | 96.4% (±0.2 points) | 91.0% (±0.1 points) | 91.0% |
| Median age of residents | 47.3 years (±3.9) | 39.1 years (±0.2) | 39.0 years (±0.1) | 38.9 years |
Union Mill covers 10.0 square miles of land, about 449 residents per square mile (Census Bureau Gazetteer).
ZIP codes in Union Mill
| ZIP code | Share of the ZIP’s land in this place | Residents | Median gross rent | Median home value | Median household income |
|---|---|---|---|---|---|
| 20124 | 37% | 14,375 | $2,378 | $884,800 | $221,060 |
A ZIP code is a mail route rather than a boundary, so the Census Bureau publishes figures for ZIP Code Tabulation Areas built from census blocks; the share column says how much of each one’s land lies in this place.
Places near Union Mill
| Place | Distance | Median gross rent | Median home value | Households that rent |
|---|---|---|---|---|
| Clifton | 1.5 mi | — | $1,050,000 | 2.1% |
| Fairfax Station | 2.7 mi | $2,794 | $897,000 | 5.7% |
| Braddock | 2.7 mi | $2,419 | $941,600 | 19.9% |
| Yorkshire | 3.5 mi | $1,777 | $451,000 | 49.6% |
| Fair Lakes | 3.6 mi | $2,419 | $588,200 | 38.9% |
| Manassas Park | 3.7 mi | $2,146 | $395,900 | 33.5% |
| Centreville | 3.9 mi | $2,299 | $590,500 | 26.8% |
| Fair Oaks | 4.7 mi | $2,275 | $608,200 | 55.3% |
HUD Fair Market Rent for Union Mill, fiscal year 2027
| Studio | 1 bedroom | 2 bedrooms | 3 bedrooms | 4 bedrooms |
|---|---|---|---|---|
| $2,111 | $2,204 | $2,438 | $3,107 | $3,658 |
HUD also publishes a Small Area Fair Market Rent for each ZIP code in the area; the Fair Market Rent page for this place lists its ZIP codes.
HUD income limits for Union Mill, fiscal year 2026
| Household size | Extremely low (30%) | Very low (50%) | Low (80%) |
|---|---|---|---|
| 1 person | $34,900 | $58,150 | $74,800 |
| 2 people | $39,900 | $66,450 | $85,450 |
| 3 people | $44,900 | $74,750 | $96,150 |
| 4 people | $49,850 | $83,050 | $106,800 |
| 5 people | $53,850 | $89,700 | $115,350 |
| 6 people | $57,850 | $96,350 | $123,900 |
| 7 people | $61,850 | $103,000 | $132,450 |
| 8 people | $65,850 | $109,650 | $141,000 |
These are the limits HUD sets for its housing programs in the Washington-Arlington-Alexandria, DC-VA-MD HUD Metro FMR Area, where HUD’s median family income for fiscal year 2026 is $166,100.
A program can use its own limits; tax-credit and local programs often do.
Union Mill is a census-designated place: an unincorporated community the Census Bureau draws for statistics, with no municipal government of its own.
Survey years: 2020–2024 (American Community Survey 5-year estimates), compared with 2015–2019.
Margins of error are at the 90% confidence level.
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Questions about Union Mill
What is the median household income in Union Mill?
The median household income in Union Mill is $250,000 or more a year (2020–2024 American Community Survey).
What is the average home value in Union Mill, VA?
The Census Bureau publishes the median: $961,400 (±$50,233) for owner-occupied homes in Union Mill (2020–2024 American Community Survey).
What is the average mortgage payment in Union Mill?
The Census Bureau publishes total owner costs rather than the mortgage alone: the median for owners with a mortgage in Union Mill, VA is $3,842 (±$342) a month, including taxes, insurance and utilities.
How much are property taxes in Union Mill?
The median real estate tax paid by homeowners in Union Mill, VA is $10,000 or more a year (2020–2024 American Community Survey).
How many homes are in Union Mill?
Union Mill, VA has an estimated 1,440 (±195) housing units, occupied and vacant (2020–2024 American Community Survey).
How old are most homes in Union Mill?
27.0% of homes in Union Mill, VA were built before 1980 (2020–2024 American Community Survey).
What ZIP codes are in Union Mill?
The ZIP code that covers Union Mill is 20124.
What is the median rent in ZIP code 20124?
The median gross rent in ZIP Code Tabulation Area 20124 is $2,378 (±$147) a month (2020–2024 American Community Survey).
Sources
- Demographic and Housing Estimates (DP05), 2020–2024 ACS 5-year estimates — Union Mill CDP, Virginia
- Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Union Mill CDP, Virginia
- Selected Economic Characteristics (DP03), 2020–2024 ACS 5-year estimates — Union Mill CDP, Virginia
- Median Real Estate Taxes Paid by Mortgage Status (B25103), 2020–2024 ACS 5-year estimates — Union Mill CDP, Virginia
- Selected Social Characteristics (DP02), 2020–2024 ACS 5-year estimates — Union Mill CDP, Virginia
- Total Population (B01003), 2015–2019 ACS 5-year estimates — Union Mill CDP, Virginia
- Median Gross Rent (B25064), 2015–2019 ACS 5-year estimates — Union Mill CDP, Virginia
- HUD Fair Market Rents, fiscal year 2027: Washington-Arlington-Alexandria, DC-VA-MD HUD Metro FMR Area
- HUD Small Area Fair Market Rents, fiscal year 2027
- HUD Income Limits, fiscal year 2026: Washington-Arlington-Alexandria, DC-VA-MD HUD Metro FMR Area
- US Census Bureau, American Community Survey 2020–2024 5-year estimates for ZIP Code Tabulation Areas
- Consumer Price Index for All Urban Consumers (CPI-U), US city average, all items, US Bureau of Labor Statistics: annual averages 2019 and 2024
- US Census Bureau, 2024 Gazetteer Files
To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Union Mill CDP, Virginia (place:80029, in state:51).
Each estimate (E or PE) has a margin of error beside it (M or PM).
The 2015–2019 figures are B01003_001E, B01003_001M, B25064_001E, B25064_001M from the 2019 release.
The API needs a free key.
DP05_0001E, DP05_0001M, DP04_0001E, DP04_0001M, DP04_0047PE, DP04_0047PM, DP04_0134E, DP04_0134M, DP03_0062E, DP03_0062M, DP04_0089E, DP04_0089M
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.
Figures last updated on .