Largest private foundations in Idaho
| # | Foundation | City | Focus area | Total assets |
|---|---|---|---|---|
| 1 | J A & Kathryn Albertson Foundation Inc | Boise | Philanthropy, Voluntarism & Grantmaking Foundations | $600.2 million |
| 2 | J R Simplot Foundation Inc | Boise | Not listed | $287.7 million |
| 3 | Islands Foundation | Boise | Philanthropy, Voluntarism & Grantmaking Foundations | $241.8 million |
| 4 | Holland M Ware Charitable Foundation | Eagle | Philanthropy, Voluntarism & Grantmaking Foundations | $221.0 million |
| 5 | Simplot Company Foundation Inc | Boise | Education | $147.9 million |
| 6 | Micron Technology Foundation Inc | Boise | Philanthropy, Voluntarism & Grantmaking Foundations | $147.2 million |
| 7 | Blue Cross Of Idaho Foundation For Health | Meridian | Health Care | $80.7 million |
| 8 | Idaho Elks Rehabilitation Hospital Inc | Boise | Health Care | $56.7 million |
| 9 | Greg Carr Foundation Inc | Idaho Falls | Philanthropy, Voluntarism & Grantmaking Foundations | $53.8 million |
| 10 | Hop & Mae Adams Foundation | Boise | Philanthropy, Voluntarism & Grantmaking Foundations | $48.6 million |
| 11 | Laura Moore Cunningham Foundation Inc | Mccall | Not listed | $43.5 million |
| 12 | The Gibney Family Foundation Inc | Meridian | Not listed | $35.3 million |
| 13 | John H And Orah I Brandt Foundation | Nampa | Not listed | $34.3 million |
| 14 | Vande Steeg Foundation Inc | Meridian | Philanthropy, Voluntarism & Grantmaking Foundations | $30.2 million |
| 15 | Hardy Foundation Inc | Boise | Arts, Culture & Humanities | $24.7 million |
| 16 | Janice Seagraves Family Foundation Inc | Twin Falls | Education | $23.0 million |
| 17 | Lewis-Clark Valley Healthcare Foundation | Coeur Dalene | Health Care | $22.5 million |
| 18 | Elaine P Wynn And Family Foundation | Ketchum | Philanthropy, Voluntarism & Grantmaking Foundations | $22.5 million |
| 19 | Bews Foundation | Twin Falls | Philanthropy, Voluntarism & Grantmaking Foundations | $22.4 million |
| 20 | John Borbonus Memorial Foundationinc | Boise | Education | $22.3 million |
| 21 | Shoemaker Family Fund Inc | Eagle | Philanthropy, Voluntarism & Grantmaking Foundations | $22.2 million |
| 22 | John F Nagel Foundation Inc | Eagle | Not listed | $21.4 million |
| 23 | Harry W Morrison Foundation Inc | Boise | Not listed | $19.4 million |
| 24 | Stevens Family Foundation Inc | Ketchum | Philanthropy, Voluntarism & Grantmaking Foundations | $17.7 million |
| 25 | Chrysopolae Foundation | Bellevue | Education | $15.5 million |
The full list includes all 547 Idaho foundations with street address, ZIP, EIN, focus area, income and tax period, plus every other state.
Idaho cities with the most private foundations
- Boise: 130
- Meridian: 42
- Idaho Falls: 34
- Ketchum: 31
- Eagle: 28
- Coeur D Alene: 27
- Twin Falls: 23
- Hayden: 13
- Hailey: 11
- Nampa: 10
Most common focus areas in Idaho
- Philanthropy, Voluntarism & Grantmaking Foundations: 225
- Education: 55
- Recreation & Sports: 34
- Human Services: 22
- Health Care: 13
- Religion-Related: 13
- Environment: 13
- Community Improvement & Capacity Building: 12
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.