William Floyd High School
Mastic Beach, NY · High School · Grades 9-12
William Floyd High School is a high school in Mastic Beach, NY with 3,013 students enrolled and a 39% proficiency rate. Part of William Floyd Union Free School District. NCES data from the U.S. Department of Education.
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About This School
William Floyd High School is a high school located in Mastic Beach, New York. The school serves 3,013 students in grades 9-12. The student-to-teacher ratio is 13.9:1.
According to EDFacts assessment data, 39% of students meet grade-level proficiency standards in combined math and reading. The school reports a 83% graduation rate.
54% of students qualify for free or reduced-price lunch.
William Floyd High School is part of the William Floyd Union Free School District in New York. The school receives Title I federal funding.
How This School Compares
William Floyd High School has 3,013 students enrolled, making it larger than the average school in William Floyd Union Free School District (996 students). Its 39% proficiency rate is 9 percentage points below the district average of 48%. Compared to the New York state average of 47%, the school performs 8 points lower. With a 13.9:1 student-teacher ratio, it offers smaller class sizes than the national average.
Other Schools in William Floyd Union Free School District
Frequently Asked Questions
William Floyd High School has 3,013 students enrolled in grades 9-12. The student-to-teacher ratio is 13.9:1.
According to EDFacts data, 39% of students at William Floyd High School meet grade-level proficiency standards in combined math and reading assessments.
William Floyd High School has a 83% graduation rate, measuring the percentage of students who graduate within four years.
William Floyd High School is part of the William Floyd Union Free School District in Mastic Beach, 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.
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.
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.