Greenwich High School
Greenwich, CT · High School · Grades 9-12
Greenwich High School is a high school in Greenwich, CT with 2,668 students enrolled and a 57% proficiency rate. Part of Greenwich School District. NCES data from the U.S. Department of Education.
Greenwich High School is a high school in Greenwich, CT that enrolls 2,668 students in grades 9-12, putting it among the larger public campuses in the Greenwich School District. That headcount is above the 565-student average for schools in the district.
EDFacts assessment data puts 57% of students at or above grade level in combined math and reading, a little above the national midpoint where roughly half of tested students clear the bar. That is 4 points below the 61% average for the Greenwich School District. Against the 53% Connecticut statewide average, the school sits 4 points higher.
Over the last three reported years the district proficiency rate this school inherits has fallen by about 13 points. As a high school, it reports a 79% adjusted-cohort graduation rate, the share of first-time ninth-graders who earn a regular diploma within four years.
The student-teacher ratio is 12.7 to 1, below the U.S. average of roughly 16 to 1, which generally allows more adult attention per student. A relatively low 20% of students qualify for free or reduced-price lunch.
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About This School
Greenwich High School is a high school located in Greenwich, Connecticut. The school serves 2,668 students in grades 9-12. The student-to-teacher ratio is 12.7:1.
According to EDFacts assessment data, 57% of students meet grade-level proficiency standards in combined math and reading. The school reports a 79% graduation rate.
20% of students qualify for free or reduced-price lunch.
Greenwich High School is part of the Greenwich School District in Connecticut.
How This School Compares
Greenwich High School has 2,668 students enrolled, making it larger than the average school in Greenwich School District (565 students). Its 57% proficiency rate is 4 percentage points below the district average of 61%. Compared to the Connecticut state average of 53%, the school performs 4 points higher. With a 12.7:1 student-teacher ratio, it offers smaller class sizes than the national average.
Frequently Asked Questions
Greenwich High School has 2,668 students enrolled in grades 9-12. The student-to-teacher ratio is 12.7:1.
According to EDFacts data, 57% of students at Greenwich High School meet grade-level proficiency standards in combined math and reading assessments.
Greenwich High School has a 79% graduation rate, measuring the percentage of students who graduate within four years.
Greenwich High School is part of the Greenwich School District in Greenwich, Connecticut. 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.
Source: NCES Common Core of Data, 2026.