CDP in Fairfax County, Virginia · 10 sq mi · 536 people per sq mi
About 5,400 people live in Union Mill. The typical household earns $250,001, and the median resident is 47.3 years old.
2026 projection
From 4,362 in 2020
Poverty rate 4.44%
Men 47.6 · Women 46.8
2020–2026
5,355
2026 projection
22.8% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2020–2026
5,355
2026 projection
22.8% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 5,355 | +335 | 6.67% |
|---|---|---|---|
| 2025 | 5,020 | +669 | 7.41% |
| 2023 | 4,351 | +49 | 1.14% |
| 2022 | 4,302 | -272 | 5.95% |
| 2021 | 4,574 | +212 | 4.86% |
| 2020 | 4,362 | — | — |
Showing 6 of 6 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 45 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 23 residents
72% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 72% | 76% | 68% |
| Never married | 22% | 23% | 22% |
| Divorced | 2% | 1% | 3% |
| Widowed | 3% | <1% | 5% |
| Separated | 1% | 0% | 2% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau