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For the 2026 school year, there are 20 private high schools belonging to National Association of Independent Schools (NAIS) serving 9,771 students in Washington. You can also find more schools membership associations in Washington.

The top-ranked private high schools belonging to National Association of Independent Schools (NAIS) in Washington include Annie Wright Schools, The Bear Creek School, and Holy Names Academy.

The average tuition cost is $34,428, which is higher than the Washington private high school average tuition cost of $17,460.

25% of private high schools belonging to National Association of Independent Schools (NAIS) in Washington are religiously affiliated (most commonly Catholic and Christian).