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Grantmaking foundations in Duncan, OK

10 grantmaking foundations in Duncan, Oklahoma, ranked by recent giving reported to the IRS (about $69M combined).

Top foundations by giving

  1. National Rural Water Association
    Duncan, OK · Philanthropy, Voluntarism and Grantmaking Foundations
    $61M (2025)
  2. Lynn Colbert Charitable Foundation
    Duncan, OK · Human Services
    $3.7M (2025)
  3. McCasland Foundation
    Duncan, OK
    $2.3M (2023)
  4. Duncan Regional Hospital Health Foundation
    Duncan, OK · Philanthropy, Voluntarism and Grantmaking Foundations
    $1M (2025)
  5. Duncan Public Schools Foundation
    Duncan, OK · Human Services
    $320K (2025)
  6. Harvey House Family Charitable Foundation
    Duncan, OK · Philanthropy, Voluntarism and Grantmaking Foundations
    $180K (2025)
  7. Tilley Foundation
    Duncan, OK · Philanthropy, Voluntarism and Grantmaking Foundations
    $85K (2024)
  8. Duncan Regional Hospital Inc
    Duncan, OK · Human Services
    $84K (2025)
  9. Joe & Jean Palmer Endowment Fund
    Duncan, OK · Philanthropy, Voluntarism and Grantmaking Foundations
    $71K (2026)
  10. Richardson Scholarship Trust
    Duncan, OK
    $2K (2025)

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Causes in Oklahoma