Lower Merion HS
Ardmore, PA · High School · Grades 9-12
Lower Merion HS is a high school in Ardmore, PA with 1,712 students enrolled and a 71% proficiency rate. Part of Lower Merion SD. NCES data from the U.S. Department of Education.
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About This School
Lower Merion HS is a high school located in Ardmore, Pennsylvania. The school serves 1,712 students in grades 9-12. The student-to-teacher ratio is 12.2:1.
According to EDFacts assessment data, 71% of students meet grade-level proficiency standards in combined math and reading. The school reports a 88% graduation rate.
17% of students qualify for free or reduced-price lunch.
Lower Merion HS is part of the Lower Merion SD in Pennsylvania.
How This School Compares
Lower Merion HS has 1,712 students enrolled, making it larger than the average school in Lower Merion SD (774 students). Its 71% proficiency rate is 4 percentage points above the district average of 68%. Compared to the Pennsylvania state average of 46%, the school performs 25 points higher. With a 12.2:1 student-teacher ratio, it offers smaller class sizes than the national average.
Frequently Asked Questions
Lower Merion HS has 1,712 students enrolled in grades 9-12. The student-to-teacher ratio is 12.2:1.
According to EDFacts data, 71% of students at Lower Merion HS meet grade-level proficiency standards in combined math and reading assessments.
Lower Merion HS has a 88% graduation rate, measuring the percentage of students who graduate within four years.
Lower Merion HS is part of the Lower Merion SD in Ardmore, Pennsylvania. 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.