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For the 2026 school year, there are 7 private high schools belonging to Middle States Association of Colleges and Secondary Schools serving 4,452 students in Delaware. You can also find more schools membership associations in Delaware.

The top-ranked private high schools belonging to Middle States Association of Colleges and Secondary Schools in Delaware include Salesianum School, St. Elizabeth School, and Red Lion Christian Academy.

The average acceptance rate is 81%, which is lower than the Delaware private high school average acceptance rate of 87%.

71% of private high schools belonging to Middle States Association of Colleges and Secondary Schools in Delaware are religiously affiliated (most commonly Catholic and Christian).