Mill Street Elem School
Naperville, IL · Elementary School
Mill Street Elem School is a elementary school in Naperville, IL with 590 students enrolled and a 61% proficiency rate. Part of Naperville CUSD 203. NCES data from the U.S. Department of Education.
Get Mill Street Elem School's new scores when they post
We'll email you the moment Mill Street Elem School changes. No spam — only real updates.
About This School
Mill Street Elem School is a elementary school located in Naperville, Illinois. The school serves 590 students. The student-to-teacher ratio is 12.6:1.
According to EDFacts assessment data, 61% of students meet grade-level proficiency standards in combined math and reading.
30% of students qualify for free or reduced-price lunch.
Mill Street Elem School is part of the Naperville CUSD 203 in Illinois.
How This School Compares
Mill Street Elem School has 590 students enrolled, making it smaller than the average school in Naperville CUSD 203 (731 students). Its 61% proficiency rate is 3 percentage points below the district average of 64%. Compared to the Illinois state average of 48%, the school performs 13 points higher. With a 12.6:1 student-teacher ratio, it offers smaller class sizes than the national average.
Frequently Asked Questions
Mill Street Elem School has 590 students enrolled. The student-to-teacher ratio is 12.6:1.
According to EDFacts data, 61% of students at Mill Street Elem School meet grade-level proficiency standards in combined math and reading assessments.
Mill Street Elem School is part of the Naperville CUSD 203 in Naperville, Illinois. 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.
For this entity, the underlying data on this page comes from NCES Common Core of Data and EDFacts. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
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.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. public schools and districts with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: NCES Common Core of Data, 2026.