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Oldest Private Schools in Illinois

The average private school in Illinois was founded around 1962 (2026).

The oldest private school in Illinois is Most Blessed Trinity Academy, founded in 1841.

Quick Facts (2026)

# IL Schools Ranked: 1,082
Top 20 Range (Year Founded): 1841–1855
IL School Avg.: 1961
National School Avg.: 1967

Quick Facts (2026)

# IL Schools Ranked: 1,082
Top 20 Range (Year Founded): 1841–1855
IL School Avg.: 1961
National School Avg.: 1967

Frequently Asked Questions

What is the Illinois average private schools founding year?

The Illinois average private schools founding year is 1962 for 2026.

What are the private schools with oldest founding year in Illinois?

The top ranked private schools in Illinois include Most Blessed Trinity Academy, St. Marys School and St. John The Baptist Catholic Academy.

What is private high school and private elementary school with the oldest founding year in Illinois?

The private high school with the oldest founding year in Illinois is Mother Mcauley Liberal Arts High School, with a year of 1846. The private elementary school with the oldest founding year is Most Blessed Trinity Academy, with a year of 1841.

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