Largest private foundations in Washington
| # | Foundation | City | Focus area | Total assets |
|---|---|---|---|---|
| 1 | Gates Foundation | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $78.7 billion |
| 2 | Gates Foundation Trust | Kirkland | Philanthropy, Voluntarism & Grantmaking Foundations | $77.6 billion |
| 3 | Fund For Science And Technology | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $3.1 billion |
| 4 | M J Murdock Charitable Trust | Vancouver | Philanthropy, Voluntarism & Grantmaking Foundations | $2.0 billion |
| 5 | Allen Family Philanthropies | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $1.4 billion |
| 6 | Norcliffe Foundation | Seattle | Not listed | $1.0 billion |
| 7 | Pivotal Philanthropies Opportunity Foundation | Redmond | Philanthropy, Voluntarism & Grantmaking Foundations | $962.6 million |
| 8 | Pivotal Philanthropies Pathways Fou Ndation | Redmond | Philanthropy, Voluntarism & Grantmaking Foundations | $962.6 million |
| 9 | Pivotal Philanthropies Momentum Foundation | Redmond | Philanthropy, Voluntarism & Grantmaking Foundations | $962.6 million |
| 10 | Marguerite Casey Foundation | Seattle | Human Services | $876.6 million |
| 11 | Roots And Wings Foundation Inc | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $611.8 million |
| 12 | Satterberg Foundation | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $425.6 million |
| 13 | Schultz Family Foundation | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $355.2 million |
| 14 | Washington Research Foundation | Seattle | Medical Research | $341.2 million |
| 15 | Giving Grousbeck Fazzalari | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $309.2 million |
| 16 | Konzen Family Foundation | Issaquah | Philanthropy, Voluntarism & Grantmaking Foundations | $242.7 million |
| 17 | Grousemont Foundation | Seattle | Not listed | $240.5 million |
| 18 | Christ Cares For Kids Foundation | Issaquah | Philanthropy, Voluntarism & Grantmaking Foundations | $229.9 million |
| 19 | Jubilee Foundation | Pasco | Religion-Related | $200.4 million |
| 20 | Sahsen Foundation | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $179.2 million |
| 21 | Names Family Foundation | Fircrest | Philanthropy, Voluntarism & Grantmaking Foundations | $178.4 million |
| 22 | Vista Hermosa | Pasco | Unknown | $174.9 million |
| 23 | Wayne D Kuni And Joan E Kuni | Vancouver | Philanthropy, Voluntarism & Grantmaking Foundations | $172.1 million |
| 24 | Bezos Family Foundation | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $154.2 million |
| 25 | Wilburforce Foundation | Seattle | Philanthropy, Voluntarism & Grantmaking Foundations | $153.3 million |
The full list includes all 1,906 Washington foundations with street address, ZIP, EIN, focus area, income and tax period, plus every other state.
Washington cities with the most private foundations
- Seattle: 450
- Bellevue: 140
- Spokane: 80
- Vancouver: 76
- Tacoma: 63
- Redmond: 47
- Kirkland: 42
- Mercer Island: 42
- Bellingham: 37
- Gig Harbor: 26
Most common focus areas in Washington
- Philanthropy, Voluntarism & Grantmaking Foundations: 931
- Education: 160
- Human Services: 82
- Arts, Culture & Humanities: 79
- Recreation & Sports: 71
- Religion-Related: 45
- Youth Development: 27
- Animal-Related: 25
Where does this data come from?
The IRS Exempt Organizations Business Master File, downloaded in October 2026 and filtered to private foundations. Assets are as reported on each foundation's latest return on file. Foundations with no focus area code are shown as Not listed.