For the 2026-27 school year, there are 69 private schools belonging to Northwest Association of Independent Schools (NWAIS) serving 16,912 students in Washington. You can also find more schools membership associations in Washington.
The top ranked private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington include Saint George's School, Annie Wright Schools, and Charles Wright Academy.
The average tuition cost is $32,249, which is higher than the Washington private school average tuition cost of $15,480.
Quick Facts (26-27)
- # Private Schools: 69




























