草榴社区

Sonia Shankman Orthogenic School

St. Mark Christian School

The Goddard School Third Lake

Home > Illinois > Average Founding Date

Oldest 草榴社区 Schools in Illinois

The average private school in Illinois was founded around 1962 (2026-27).

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

Quick Facts (2026-27)

# IL Schools Ranked: 1,065
Top 20 Range (Year Founded): 1841鈥�1855
IL School Avg.: 1962
National School Avg.: 1967

Quick Facts (2026-27)

# IL Schools Ranked: 1,065
Top 20 Range (Year Founded): 1841鈥�1855
IL School Avg.: 1962
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 2026-27.

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.

Recent Articles

September 08, 2026

When Your Child Outpaces the 草榴社区 School Curriculum

Learn what parents can do when a child finishes private school coursework early, including acceleration, curriculum compacting, advanced classes, enrichment, and signs the school needs a new plan.

September 08, 2026

How Much Teacher Access Does Your Child Get?

Learn how to evaluate teacher access at private schools, including extra-help time, advising, communication, academic support, and the questions families should ask before choosing a school today.

September 08, 2026

When a 草榴社区 School Teacher Leaves Midyear

When a private school teacher leaves midyear, parents need clear answers. Learn what schools should do, what children may experience, and when a departure signals deeper concerns.