Union Mill Elementary
🇺🇸 Official data · 2025Clifton, Virginia 20124 · Fairfax County Public Schools
#140 of 1,142 elementary schools in Virginia
#1287 of 50,301 nationally
About Union Mill Elementary
Union Mill Elementary is a public elementary located in Clifton, in the Fairfax County Public Schools school district of Virginia, United States. It caters for Grades PK–6. In 2025 it enrolled 874 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 88.1 out of 100, placing it in the top 5% of elementary schools in United States and 140th of 1,142 ranked elementary schools in Virginia. Its strongest component is math proficiency (99th percentile), and its weakest is students per teacher (34th percentile).
Other published figures: enrollment 874.
There are 3 schools in Clifton; Union Mill Elementary ranks 2nd of 3 scored schools there.
Success Index (US) breakdown
Each component is a percentile against elementary schools across United States.
- Math proficiency (30%)93%
- Reading proficiency (30%)86%
- Community advantage (fewer free/reduced-price lunch) (25%)12.5%
- Students per teacher (15%)16.2
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Union Mill Elementary by the official sources.
- Enrollment
- 874
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 12.5%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 16.2
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 86%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 93%
- Share of tested students proficient or above (all students, all grades).
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Schools near Union Mill Elementary
Closest schools by straight-line distance, with their Success Index (US).
Centreville High
Clifton · Public high · Grades 9–12
2,347 students · 779 m away
Liberty Middle
Clifton · Public middle · Grades 7–8
913 students · 1.7 km away
Centreville Elementary
Centreville · Public elementary · Grades PK–6
741 students · 2.0 km away
Centre Ridge Elementary
Centreville · Public elementary · Grades PK–6
635 students · 2.5 km away
Powell Elementary
Centreville · Public elementary · Grades PK–6
872 students · 3.0 km away
Willow Springs Elementary
Fairfax · Public elementary · Grades PK–6
818 students · 3.5 km away
London Towne Elementary
Centreville · Public elementary · Grades PK–6
658 students · 4.0 km away
Poplar Tree Elementary
Chantilly · Public elementary · Grades PK–6
683 students · 4.7 km away
Yorkshire Elementary
Manassas · Public elementary · Grades PK–5
851 students · 5.0 km away
Manassas Park High
Manassas Park · Public high · Grades 9–12
1,070 students · 5.1 km away
Similar schools
Public elementary schools in Virginia with a comparable Enrollment.
Orange Hunt Elementary
Springfield · Public elementary · Grades PK–6
874 students
Kyle R. Wilson Elementary
Woodbridge · Public elementary · Grades PK–5
875 students
Powell Elementary
Centreville · Public elementary · Grades PK–6
872 students
J.G. Hening Elementary
North Chesterfield · Public elementary · Grades PK–5
877 students
Hybla Valley Elementary
Alexandria · Public elementary · Grades PK–6
878 students
Stafford Elementary
Stafford · Public elementary · Grades K–5
879 students
Frequently asked questions
Is Union Mill Elementary a good school?
Union Mill Elementary has a Success Index (US) of 88.1 out of 100 (Top 5% of elementary schools in United States) and ranks #140 of 1,142 in Virginia. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Union Mill Elementary rank in Virginia?
Union Mill Elementary ranks #140 of 1,142 elementary schools in Virginia and #1287 of 50,301 nationally on the Success Index (US) (2025 data).
How many students attend Union Mill Elementary?
Union Mill Elementary had 874 students in 2025.
Is Union Mill Elementary a elementary school or a high school?
Union Mill Elementary is classified as a elementary covering Grades PK–6. It is a public school.
What other schools are near Union Mill Elementary?
There are 10 schools within 15 km of Union Mill Elementary; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.