Fenwick
St. Viator High School is a Roman Catholic co-educational secondary school in Arlington Heights, Illinois.
Seton Catholic Preporatory High School in Chandler.
In terms of academics, the answer is far and away St. Patrick (follow link below). It's the only Catholic school that made the Tribune list of best Chicago area high schools, and the only Catholic school that posts test scores that rival places like New Trier and Chicago Latin school.
The best private high school in Arkanasas hands down would have to be Little Rock Catholic High School.
yes there are so many military academic schools in illinois,carver military high schools was one of the best school in illinois
Bishop Watterson High School
Lakeshore Catholic High School was created in 1988.
Hampshire High School - Illinois - was created in 1838.
Ridgewood High School - Illinois - was created in 1960.
Illinois High School Association was created in 1900.
Woodstock High School - Illinois - was created in 1921.
Princeton High School - Illinois - was created in 1867.