Westtown School Top 5 · Largest Endowment (PA)

Home > Find Schools > School Rankings > Average Founding Date > Pennsylvania

Oldest Private High Schools in Pennsylvania

The average private high school in Pennsylvania was founded around 1957 (2026-27).

The oldest private high school in Pennsylvania is Friends Select School and William Penn Charter School, each founded in 1689.

Quick Facts (26-27)

# PA Schools Ranked: 407
Top 20 Range (Year Founded): 1689–1845
PA School Avg.: 1954
National School Avg.: 1967

Quick Facts (26-27)

# PA Schools Ranked: 407
Top 20 Range (Year Founded): 1689–1845
PA School Avg.: 1954
National School Avg.: 1967

Frequently Asked Questions

What is the Pennsylvania average private high schools founding year?

The Pennsylvania average private high schools founding year is 1957 for 2026-27.

What are the private high schools with oldest founding year in Pennsylvania?

The top ranked private high schools in Pennsylvania include Friends Select School, William Penn Charter School and Abington Friends School.

Recent Articles

October 27, 2026

When a Private School Changes Head of School

A private school leadership change can raise important questions. Learn how to evaluate head of school transitions, identify warning signs, and protect your child's educational experience before enrolling confidently.

October 27, 2026

Private School Financial Aid Renewal: Could Awards Shrink?

Could your private school financial aid shrink next year? Learn why awards change, how income and school budgets affect renewal, and what parents can do to protect affordability long-term.

October 27, 2026

Need-Blind vs. Need-Aware Private School Admissions

Understand how need-blind and need-aware private school admissions affect acceptance decisions, financial aid eligibility, and affordability, with practical guidance to help parents compare schools, ask questions, and plan confidently ahead.