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Oldest Private Schools in Idaho

The average private school in Idaho was founded around 1979 (2026-27).

The oldest private school in Idaho is St. Joseph's Catholic School, founded in 1900.

Quick Facts (26-27)

# ID Schools Ranked: 103
Top 20 Range (Year Founded): 1900–1961
ID School Avg.: 1979
National School Avg.: 1967

Quick Facts (26-27)

# ID Schools Ranked: 103
Top 20 Range (Year Founded): 1900–1961
ID School Avg.: 1979
National School Avg.: 1967

Frequently Asked Questions

What is the Idaho average private schools founding year?

The Idaho average private schools founding year is 1979 for 2026-27.

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

The top ranked private schools in Idaho include St. Joseph's Catholic School, Greenleaf Friends Academy and Northwest Children's Home.

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

The private high school with the oldest founding year in Idaho is Greenleaf Friends Academy, with a year of 1908. The private elementary school with the oldest founding year is St. Joseph's Catholic School, with a year of 1900.

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