Harriton Senior High School, also known simply as Harriton High School, is a public secondary school in Rosemont, Pennsylvania, serving portions of Lower Merion Township, Pennsylvania. The school is located on the Philadelphia Main Line.
Serving 1,206 students in grades 9-12, Harriton Sr. High School ranks in the top 5% of all schools in Pennsylvania for overall test scores (math proficiency is top 5%, and reading proficiency is top 5%).
The percentage of students achieving proficiency in math is 78% (which is higher than the Pennsylvania state average of 38%). The percentage of students achieving proficiency in reading/language arts is 91% (which is higher than the Pennsylvania state average of 55%).
The student-teacher ratio of 10:1 is lower than the Pennsylvania state level of 13:1.
Minority enrollment is 31% of the student body (majority Asian and Black), which is lower than the Pennsylvania state average of 39% (majority Hispanic and Black).
Quick Facts (2025)
- Grades: 9-12
- Enrollment: 1,206 students
- Student-Teacher Ratio: 10:1
- Minority Enrollment: 31%
- Graduation Rate: 97% (Top 5% in PA)
- Overall Testing Rank: Top 5%
- Math Proficiency: 78% (Top 5%)
- Reading Proficiency: 91% (Top 1%)
- Science Proficiency: ≥50% (Btm 50%)
- Source: National Center for Education Statistics (NCES), PA Dept. of Education
Top Rankings
Harriton Sr. High School ranks among the top 20% of public schools in Pennsylvania for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
Graduation Rate
Student Attention
School Overview
Harriton Sr. High School's student population of 1,206 students has stayed relatively flat over five school years.
The teacher population of 118 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,206 students
Gender %
Total Classroom Teachers
118 teachers
Year Founded
1958
Colors
White, Black, Red
School Calendar
First Day of School
Mon. Sep 1, 2025
Last Day of School
Wed. Jun 17, 2026
School Motto
'Enter to Learn, Go Forth to Serve'
School Rankings
Harriton Sr. High School ranks within the top 5% of all 2,733 schools in Pennsylvania (based off of combined math and reading proficiency testing data).
The diversity score of Harriton Sr. High School is 0.50, which is less than the diversity score at state average of 0.59. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#37 out of 2733 schools
(Top 5%)
(Top 5%)
Math Test Scores (% Proficient)
78%
38%
Reading/Language Arts Test Scores (% Proficient)
91%
55%
Science Test Scores (% Proficient)
≥50%
57%
Student-Teacher Ratio
10:1
13:1
American Indian
n/a
n/a
Asian
11%
5%
Hispanic
6%
15%
Black
8%
14%
White
69%
61%
Hawaiian
n/a
n/a
Two or more races
6%
5%
All Ethnic Groups
Graduation Rate
97%
87%
Eligible for Free Lunch
15%
60%
Eligible for Reduced Lunch
1%
2%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), PA Dept. of Education
Profile last updated: 02/09/2025
Frequently Asked Questions
What is Harriton Sr. High School's ranking?
Harriton Sr. High School is ranked #37 out of 2,733 schools, which ranks it among the top 5% of public schools in Pennsylvania.
What schools are Harriton Sr. High School often compared to?
Harriton Sr. High Schoolis often viewed alongside schools like Lower Merion High School, Radnor Sr. High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
78% of students have achieved math proficiency (compared to the 38% PA state average), while 91% of students have achieved reading proficiency (compared to the 55% PA state average).
What is the graduation rate of Harriton Sr. High School?
The graduation rate of Harriton Sr. High School is 97%, which is higher than the Pennsylvania state average of 87%.
How many students attend Harriton Sr. High School?
1,206 students attend Harriton Sr. High School.
What is the racial composition of the student body?
69% of Harriton Sr. High School students are White, 11% of students are Asian, 8% of students are Black, 6% of students are Hispanic, and 6% of students are Two or more races.
What is the student-teacher ratio of Harriton Sr. High School?
Harriton Sr. High School has a student ration of 10:1, which is lower than the Pennsylvania state average of 13:1.
What grades does Harriton Sr. High School offer ?
Harriton Sr. High School offers enrollment in grades 9-12 (No virtual instruction).
What school district is Harriton Sr. High School part of?
Harriton Sr. High School is part of Lower Merion School District.
School Reviews
Review Harriton Sr. High School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
Why Single-Sex Public Schools are Growing in Popularity
This article examines the growing trend of single-sex public schools in the United States. It explores the potential benefits, research findings, and controversies surrounding gender-specific education, as well as the factors driving its increasing popularity among parents and educators.
When Teachers Cheat: The Standardized Test Controversies
Teachers across the country are being accused of cheating on standardized tests, using erasers to conveniently change their students’ answers. However, are these teachers driven to cheat because the funding system is flawed?
When Field Trips Turn Deadly: Who is Responsible?
Recent deaths during field trips have parents and school officials questioning the safety of these excursions. Learn about these tragedies and what parameters should be in place to ensure a safe field trip.
