Mill Run Elementary
Ashburn, VA · Elementary School · Grades -1-5
Mill Run Elementary is a elementary school in Ashburn, VA with 677 students enrolled and a 72% proficiency rate. Part of Loudoun County Public Schools. NCES data from the U.S. Department of Education.
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About This School
Mill Run Elementary is a elementary school located in Ashburn, Virginia. The school serves 677 students in grades -1-5. The student-to-teacher ratio is 14.4:1.
According to EDFacts assessment data, 72% of students meet grade-level proficiency standards in combined math and reading.
7% of students qualify for free or reduced-price lunch.
Mill Run Elementary is part of the Loudoun County Public Schools in Virginia.
How This School Compares
Mill Run Elementary has 677 students enrolled, making it smaller than the average school in Loudoun County Public Schools (851 students). Its 72% proficiency rate is 14 percentage points above the district average of 58%. Compared to the Virginia state average of 46%, the school performs 27 points higher. With a 14.4:1 student-teacher ratio, it offers smaller class sizes than the national average.
Other Schools in Loudoun County Public Schools
Frequently Asked Questions
Mill Run Elementary has 677 students enrolled in grades -1-5. The student-to-teacher ratio is 14.4:1.
According to EDFacts data, 72% of students at Mill Run Elementary meet grade-level proficiency standards in combined math and reading assessments.
Mill Run Elementary is part of the Loudoun County Public Schools in Ashburn, Virginia. You can view all schools in this district on the district page.
All data on this page comes from the National Center for Education Statistics (NCES) Common Core of Data and EDFacts assessment results. These are official federal datasets published by the U.S. Department of Education.
School profiles are built from NCES directory data and EDFacts assessment results. Proficiency rates reflect combined math and reading performance. Graduation rates are reported for high schools with available data.
The this entity record above pulls directly from NCES Common Core of Data and EDFacts. What follows is the per-entity context — how this entity sits in the broader U.S. K-12 school outcomes and enrollment distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the NCES Common Core of Data and EDFacts portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. public schools and districts. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: NCES Common Core of Data, 2026.