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 1,239 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 11:1 is lower than the Pennsylvania state level of 13:1.
Minority enrollment is 35% of the student body (majority Asian and Black), which is lower than the Pennsylvania state average of 40% (majority Hispanic and Black).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,239 students
- Student-Teacher Ratio: 11:1
- Minority Enrollment: 35%
- 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 1,239 students has stayed relatively flat over five school years.
The teacher population of 116 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,239 students
Total Classroom Teachers
116 teachers
Year Founded
1958
Colors
White, Black, Red
School Calendar
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 0.55, which is less than the diversity score at state average of 0.60. 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
11:1
13:1
American Indian
n/a
n/a
Asian
13%
5%
Hispanic
7%
16%
Black
9%
14%
White
65%
60%
Hawaiian
n/a
n/a
Two or more races
6%
5%
All Ethnic Groups
Graduation Rate
97%
87%
Eligible for Free Lunch
14%
59%
Eligible for Reduced Lunch
1%
2%
School Statewide Testing
School District Name
Lower Merion School District
Source: National Center for Education Statistics (NCES), PA Dept. of Education
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 Radnor Sr. High School, Lower Merion 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?
1,239 students attend Harriton Sr. High School.
What is the racial composition of the student body?
65% of Harriton Sr. High School students are White, 13% of students are Asian, 9% of students are Black, 7% 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 11:1, 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
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