Brightmont Academy - Sammamish Top 5 · Most AP Courses (WA)

Charles Wright Academy Top 8 · Highest Avg. ACT Score (WA)

Willows Preparatory School Top 3 · Largest Endowment (WA)

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Average Private High School endowment in Washington

The average private high school endowment in Washington is $50.1M (2026).

The private high school in Washington with the highest endowment is Willows Preparatory School, with a endowment of $500M.

Quick Facts (2026)

# WA Schools Ranked: 21
Top 20 Range (Endowment): $1–$500
WA School Avg.: $50
National School Avg.: $42

Quick Facts (2026)

# WA Schools Ranked: 21
Top 20 Range (Endowment): $1–$500
WA School Avg.: $50
National School Avg.: $42

Washington Average Endowment (Trends)

View Data

Year	Washington (WA) avg
2025	$49.4
2024	$12.1
2023	$8.8
2022	$7.7
2021	$8.8
2020	$8.8
2019	$8.8
2018	$4.1
2017	$7

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Show school map — Washington (endowment range: $1–$500, avg $50)

Endowment Range: $1M $500M Avg. Endowment: $50.1M

Frequently Asked Questions

What is the Washington average private high schools endowment?

The Washington average private high schools endowment is $50.1M for 2026.

What are the private high schools with the highest endowment in Washington?

The top ranked private high schools in Washington include Willows Preparatory School, Bishop Blanchet High School and Brightmont Academy - Sammamish.

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