West Mercer Elementary
Mercer Island, WA · Elementary School
West Mercer Elementary is a elementary school in Mercer Island, WA with 422 students enrolled and a 70% proficiency rate. Part of Mercer Island School District. NCES data from the U.S. Department of Education.
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About This School
West Mercer Elementary is a elementary school located in Mercer Island, Washington. The school serves 422 students. The student-to-teacher ratio is 18.3:1.
According to EDFacts assessment data, 70% of students meet grade-level proficiency standards in combined math and reading.
7% of students qualify for free or reduced-price lunch.
West Mercer Elementary is part of the Mercer Island School District in Washington.
How This School Compares
West Mercer Elementary has 422 students enrolled, making it smaller than the average school in Mercer Island School District (676 students). Its 70% proficiency rate is 2 percentage points above the district average of 69%. Compared to the Washington state average of 49%, the school performs 21 points higher.
Frequently Asked Questions
West Mercer Elementary has 422 students enrolled. The student-to-teacher ratio is 18.3:1.
According to EDFacts data, 70% of students at West Mercer Elementary meet grade-level proficiency standards in combined math and reading assessments.
West Mercer Elementary is part of the Mercer Island School District in Mercer Island, Washington. 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.
this entity is one of the data points covered by this site’s U.S. K-12 school outcomes and enrollment dataset. The detail above comes directly from NCES Common Core of Data and EDFacts; the context that follows situates the headline numbers against the broader distribution across U.S. public schools and districts.
Every number on this page links back to NCES Common Core of Data and EDFacts; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
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.