1. Home
  2. Virginia
  3. Clifton
  4. Fairfax County Public Schools
  5. Union Mill Elementary
Beta You're viewing our redesigned school page. Prefer the classic layout?

Union Mill Elementary

Public Grades PK, KG-6
154th
SchoolDigger Rank ?
of 1,111 Virginia Elementary Schools
Better than 86% of Virginia elementary schools
Summary

Union Mill Elementary is a pre-K through 6th grade school in Clifton, VA, serving 874 students as part of Fairfax County Public Schools. The school holds a 4-star SchoolDigger rating and ranks 154th out of 1,111 Virginia elementary schools, placing it in the 86th percentile statewide. Among nearby schools, only Poplar Tree Elementary (45th) and Willow Springs Elementary (127th) rank higher; Union Mill outperforms most of its local cluster by a wide margin. The school has been consistently strong for over a decade, with rankings ranging from 130th to 297th, and rebounded sharply in 2025-2026 to its best position since 2021-2022.

Union Mill's academic results are its biggest draw. SOL proficiency rates exceed district and state averages in nearly every subject and grade, averaging roughly 85.7% across all tested grades. Science is a particular strength: 5th grade science proficiency of 87.27% is the highest among nearby schools, including Poplar Tree (86.14%) and Willow Springs (83.09%). The school also excels in 6th grade math, where 87.88% of students are proficient versus 63.19% statewide. Attendance is excellent, with only 7.2% of students chronically absent compared to 11.9% for the district and 14.8% for the state. Subgroup performance is also strong: Hispanic, multiracial, low-income, and female students all rank in the top 15% statewide compared with their peers.

Union Mill achieves these results efficiently. It spends the least per pupil ($10,116) of every nearby school in the comparison group, yet still produces top-tier outcomes. Two areas are worth monitoring: 5th grade math proficiency (74.14%) is the clearest soft spot, and the English Language Learner subgroup, ranked in the 92nd percentile statewide in 2023-2024, dropped to the 59th percentile in 2024-2025. Overall, Union Mill offers a strong academic foundation with particularly impressive results in science, reading, and advanced math preparation.

874
Students ?
15.9
Student/teacher ratio ?
$11,368
Per pupil spending ?
12.5%
Free/reduced lunch eligible (2024-25) ?
 13611 Springstone Dr
       Clifton, VA  20124-2375

(703) 322-8500

District: Fairfax County Public Schools

Racial breakdown:

White:
59.4%
Asian:
16.2%
Hispanic:
10.6%
more
 See top rated Virginia elementary schools

 Compare Union Mill Elementary to nearby elementary schools!
At a glance
▬ Ranking trend: Holding steady — 88th percentile in 2016 → 86th in 2026
Strengths
✓Test scores above the Virginia average (86% vs 71% meeting standards)
✓Ranks in the top 14% of Virginia elementary schools
Worth a look
!Some student groups rank well below the school's overall statewide standing
Students meeting standards (2025-2026) ?
This school86%
District avg75%
Virginia avg71%
154th of 1,111
Virginia public elementary schools ?
Top 14%▼ down 2 pts since 2016
See the entire ranking list of Virginia Elementary Schools →
★★★★★
SchoolDigger rating ?
41st of 137Elementary Schools in the Fairfax County Public Schools
39th of 131Fairfax County Public Schools among Virginia districts
Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)
Show full rank history (all student groups)

All Students

YearAvg scoreStatewide rankVirginia percentileRating
202683.4154 of 111186.1%★★★★☆
202574.3297 of 111073.2%★★★★☆
202478.8232 of 111479.2%★★★★☆
202379.0223 of 111480.0%★★★★☆
202285.3130 of 110988.3%★★★★☆
202173.4296 of 110373.2%★★★★☆
201976.5219 of 110580.2%★★★★☆
201880.0154 of 109786.0%★★★★☆
201778.7167 of 109984.8%★★★★☆
201681.4132 of 109688.0%★★★★☆
201573.7244 of 110077.8%★★★★☆
201476.3200 of 111082.0%★★★★☆
201380.9133 of 112088.1%★★★★☆
201276.0192 of 111782.8%★★★★☆
201180.0126 of 111788.7%★★★★☆
201076.2160 of 111385.6%★★★★☆
200980.695 of 108291.2%★★★★★
200880.694 of 108191.3%★★★★★
200780.7113 of 108389.6%★★★★☆
200682.873 of 107193.2%★★★★★
200586.340 of 106296.2%★★★★★

Asian

YearAvg scoreStatewide rankVirginia percentileRating
202666.780 of 24667.5%★★★☆☆
202549.0149 of 24940.2%★★☆☆☆
202451.5135 of 23843.3%★★☆☆☆
202356.6106 of 23053.9%★★★☆☆

Disabled

YearAvg scoreStatewide rankVirginia percentileRating
202670.3101 of 42076.0%★★★★☆
202456.1177 of 35550.1%★★★☆☆
202365.1102 of 32468.5%★★★☆☆

English Language Learner

YearAvg scoreStatewide rankVirginia percentileRating
202555.6134 of 32658.9%★★★☆☆
202486.923 of 30692.5%★★★★★
202387.423 of 30092.3%★★★★★

Female

YearAvg scoreStatewide rankVirginia percentileRating
202684.5116 of 110089.5%★★★★☆
202574.9265 of 109675.8%★★★★☆
202476.1241 of 109878.1%★★★★☆
202377.5221 of 110079.9%★★★★☆

Hispanic

YearAvg scoreStatewide rankVirginia percentileRating
202683.170 of 61988.7%★★★★☆
202561.1242 of 60660.1%★★★☆☆
202475.7114 of 58080.3%★★★★☆
202362.7212 of 56462.4%★★★☆☆

Low Socio Economic Status

YearAvg scoreStatewide rankVirginia percentileRating
202679.4122 of 104088.3%★★★★☆
202562.2373 of 104664.3%★★★☆☆
202471.7238 of 103677.0%★★★★☆

Male

YearAvg scoreStatewide rankVirginia percentileRating
202679.2191 of 109982.6%★★★★☆
202570.1335 of 109369.4%★★★☆☆
202478.0220 of 110180.0%★★★★☆
202377.3226 of 109379.3%★★★★☆

Multi-racial

YearAvg scoreStatewide rankVirginia percentileRating
202682.729 of 30690.5%★★★★★
202569.980 of 27170.5%★★★★☆
202484.427 of 24789.1%★★★★☆
202358.3117 of 24552.2%★★★☆☆

White

YearAvg scoreStatewide rankVirginia percentileRating
202667.5314 of 97467.8%★★★☆☆
202557.2443 of 97354.5%★★★☆☆
202463.5371 of 97962.1%★★★☆☆
202369.3274 of 98472.2%★★★★☆
How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)
Multi-racial (2026)91st percentile+4 vs school
Female (2026)89th percentile+3 vs school
Hispanic (2026)89th percentile+3 vs school
Low Socio Economic Status (2026)88th percentile~ school
Male (2026)83rd percentile-4 vs school
Disabled (2026)76th percentile-10 vs school
White (2026)68th percentile-18 vs school
Asian (2026)67th percentile-19 vs school
English Language Learner (2025)59th percentile-14 vs school
By subject vs Virginia (2025-2026) ?
Science87%+19 vs state
English Reading87%+15 vs state
Mathematics86%+15 vs state

1.0
1 rating · 1 written review
5★0
4★0
3★0
2★0
1★1
Rate Union Mill Elementary
Have first-hand experience? A quick rating - and a sentence or two about what stands out (teachers, academics, safety, communication) - helps other families know what to expect.
Takes about a minute. We email you a link to verify your review - your address is never shown publicly.
Tap a star to rate
What people are saying
by a parent
Monday, October 26, 2009

Open Quote Bullying is a sport at this school. Close Quote




Schools Near Union Mill Elementary

Sort
Ranking:
Map legend
E Elementary M Middle H High A Alternative P Private





Frequently Asked Questions about Union Mill Elementary

In the 2024-25 school year, 874 students attended Union Mill Elementary.

Union Mill Elementary ranks 154th of 1111 Virginia elementary schools. SchoolDigger rates this school 4 stars out of 5.

Students at Union Mill Elementary are 59% White, 16% Asian, 11% Hispanic, 9% Two or more races, 5% African American.

Rate Union Mill Elementary!



Other helpful SchoolDigger resources...


Compare to nearby schools

VAVirginia Elementary School Rankings

VAVirginia District Rankings

Schools in Clifton, VA

Sign up for updates!

Be the first to know when there is an update for Union Mill Elementary!


Latest Virginia data All new data »
2024–25 school spending dataNewOct 12, 2026
2025–26 attendance data, dropout rates & graduation ratesNewOct 12, 2026
2025–26 SOL test scoresAug 25, 2026
2021–22 school spending dataFeb 16, 2026


SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Virginia Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.

Diagnostics