Williamsville South High School
Williamsville, NY · High School · Grades 9-12
Williamsville South High School is a high school in Williamsville, NY with 857 students enrolled and a 62% proficiency rate. Part of Williamsville Central School District. NCES data from the U.S. Department of Education.
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About This School
Williamsville South High School is a high school located in Williamsville, New York. The school serves 857 students in grades 9-12. The student-to-teacher ratio is 11.7:1.
According to EDFacts assessment data, 62% of students meet grade-level proficiency standards in combined math and reading. The school reports a 81% graduation rate.
27% of students qualify for free or reduced-price lunch.
Williamsville South High School is part of the Williamsville Central School District in New York.
How This School Compares
Williamsville South High School has 857 students enrolled, making it larger than the average school in Williamsville Central School District (740 students). Its 62% proficiency rate is 1 percentage points below the district average of 63%. Compared to the New York state average of 47%, the school performs 15 points higher. With a 11.7:1 student-teacher ratio, it offers smaller class sizes than the national average.
Frequently Asked Questions
Williamsville South High School has 857 students enrolled in grades 9-12. The student-to-teacher ratio is 11.7:1.
According to EDFacts data, 62% of students at Williamsville South High School meet grade-level proficiency standards in combined math and reading assessments.
Williamsville South High School has a 81% graduation rate, measuring the percentage of students who graduate within four years.
Williamsville South High School is part of the Williamsville Central School District in Williamsville, New York. 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.
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.