Southern Lehigh High School is a four-year public high school located in Center Valley, Pennsylvania in the Lehigh Valley region of eastern Pennsylvania. It is the only high school in the Southern Lehigh School District.
Serving 1,013 students in grades 9-12, Southern Lehigh Sr. High School ranks in the top 10% of all schools in Pennsylvania for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 60-64% (which is higher than the Pennsylvania state average of 38%). The percentage of students achieving proficiency in reading/language arts is 84% (which is higher than the Pennsylvania state average of 55%).
The student-teacher ratio of 15:1 is higher than the Pennsylvania state level of 13:1.
Minority enrollment is 19% of the student body (majority Asian and Hispanic), which is lower than the Pennsylvania state average of 40% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,013 students
- Student-Teacher Ratio: 15:1
- Minority Enrollment: 19%
- Graduation Rate: 97% (Top 5% in PA)
- Overall Testing Rank: Top 10%
- Math Proficiency: 60-64% (Top 20%)
- Reading Proficiency: 84% (Top 5%)
- Science Proficiency: <50% (Btm 50%)
- Source: National Center for Education Statistics (NCES), PA Dept. of Education
Top Rankings
Southern Lehigh Sr. High School ranks among the top 20% of public schools in Pennsylvania for:
Category
Attribute
Overall Rank
Most improved public schools
Math Proficiency
Reading/Language Arts Proficiency
Graduation Rate
School Overview
Southern Lehigh Sr. High School's student population of 1,013 students has declined by 6% over five school years.
The teacher population of 66 teachers has grown by 8% over five school years.
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,013 students
Total Classroom Teachers
66 teachers
Year Founded
1955
Colors
White, Blue
School Calendar
School Rankings
Southern Lehigh Sr. High School ranks within the top 10% of all 2,733 schools in Pennsylvania (based off of combined math and reading proficiency testing data).
The diversity score of Southern Lehigh Sr. High School is 0.34, 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
#218 out of 2733 schools
(Top 10%)
(Top 10%)
Math Test Scores (% Proficient)
60-64%
38%
Reading/Language Arts Test Scores (% Proficient)
84%
55%
Science Test Scores (% Proficient)
<50%
57%
Student-Teacher Ratio
15:1
13:1
American Indian
n/a
n/a
Asian
8%
5%
Hispanic
7%
16%
Black
2%
14%
White
81%
60%
Hawaiian
n/a
n/a
Two or more races
2%
5%
All Ethnic Groups
Graduation Rate
97%
87%
Eligible for Free Lunch
19%
59%
Eligible for Reduced Lunch
2%
2%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), PA Dept. of Education
School Notes
- School Mascot: Sparta The Spartan
Frequently Asked Questions
What is Southern Lehigh Sr. High School's ranking?
Southern Lehigh Sr. High School is ranked #218 out of 2,733 schools, which ranks it among the top 10% of public schools in Pennsylvania.
What schools are Southern Lehigh Sr. High School often compared to?
Southern Lehigh Sr. High Schoolis often viewed alongside schools like Parkland High School, Emmaus High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
60-64% of students have achieved math proficiency (compared to the 38% PA state average), while 84% of students have achieved reading proficiency (compared to the 55% PA state average).
What is the graduation rate of Southern Lehigh Sr. High School?
The graduation rate of Southern Lehigh Sr. High School is 97%, which is higher than the Pennsylvania state average of 87%.
How many students attend Southern Lehigh Sr. High School?
1,013 students attend Southern Lehigh Sr. High School.
What is the racial composition of the student body?
81% of Southern Lehigh Sr. High School students are White, 8% of students are Asian, 7% of students are Hispanic, 2% of students are Black, and 2% of students are Two or more races.
What is the student-teacher ratio of Southern Lehigh Sr. High School?
Southern Lehigh Sr. High School has a student ration of 15:1, which is higher than the Pennsylvania state average of 13:1.
What grades does Southern Lehigh Sr. High School offer ?
Southern Lehigh Sr. High School offers enrollment in grades 9-12 (No virtual instruction).
What school district is Southern Lehigh Sr. High School part of?
Southern Lehigh Sr. High School is part of Southern Lehigh School District.
School Reviews
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