A river running through a deep pine forest valley

Cause EnvironmentState Hawaii60 funders

Foundations that fund environment in Hawaii

60 private foundations based in Hawaii with a return in the last two years gave $3.7 million to environment organizations in 135 grants. The median grant was $10,000, and 32 of these foundations accept applications.

Foundations with a return in the last two years, each by its latest return (tax years 2024 to 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

Ranked by giving to environment

Top 50

Grants in each foundation’s latest return to organizations whose IRS category is environment.

  1. Kosasa FoundationHonolulu, HI · tax year 2024 12 grants Accepts applications $948,888 to environment
  2. Hau'oli Mau Loa FoundationHonolulu, HI · tax year 2024 4 grants Preselected only $645,000 to environment
  3. Harold KL Castle FoundationKailua, HI · tax year 2024 11 grants Accepts applications $247,500 to environment
  4. Frost Family FoundationHonolulu, HI · tax year 2024 3 grants Accepts applications $200,000 to environment
  5. McInerny FoundationHonolulu, HI · tax year 2024 3 grants Preselected only $155,000 to environment
  6. Degeners Flora Hawaiiensis TrustHonolulu, HI · tax year 2025 1 grant Preselected only $138,000 to environment
  7. Maurice and Joanna Sullivan Family FoundationHonolulu, HI · tax year 2025 1 grant Preselected only $100,000 to environment
  8. The Strong FoundationHonolulu, HI · tax year 2024 1 grant Accepts applications $100,000 to environment
  9. Cooke Foundation LimitedHonolulu, HI · tax year 2024 5 grants Accepts applications $95,300 to environment
  10. The Frost FoundationLahaina, HI · tax year 2025 3 grants Preselected only $85,000 to environment
  11. Marshall & Yuko Hung FoundationHonolulu, HI · tax year 2025 3 grants Accepts applications $70,000 to environment
  12. First Hawaiian Bank FoundationHonolulu, HI · tax year 2024 3 grants Accepts applications $56,666 to environment
  13. Waimakua FoundationLihue, HI · tax year 2024 3 grants Accepts applications $52,000 to environment
  14. Abigail K K Kawananakoa FoundationHonolulu, HI · tax year 2024 1 grant Preselected only $50,000 to environment
  15. James & Abigail Campbell Family FoundationKapolei, HI · tax year 2024 1 grant Accepts applications $50,000 to environment
  16. The Clarence TC Ching FoundationHonolulu, HI · tax year 2024 2 grants Accepts applications $44,700 to environment
  17. AMA Olukai FoundationHonolulu, HI · tax year 2025 3 grants Accepts applications $42,000 to environment
  18. Fred Baldwin Memorial FoundationHonolulu, HI · tax year 2025 5 grants Accepts applications $35,000 to environment
  19. SW Wilcox TrustHonolulu, HI · tax year 2024 2 grants Preselected only $35,000 to environment
  20. E Kupaku Ka Aina - the Hawaii Land Restoration InstituteWailuku, HI · tax year 2024 1 grant Preselected only $28,330 to environment
  21. The Makana Aloha FoundationKailua, HI · tax year 2024 3 grants Accepts applications $28,000 to environment
  22. D'olier Family FoundationHonolulu, HI · tax year 2025 1 grant Preselected only $25,000 to environment
  23. Nuestro Futuro IncHaiku, HI · tax year 2024 2 grants Preselected only $23,250 to environment
  24. Bank of Hawaii Charitable FDNHonolulu, HI · tax year 2024 1 grant Accepts applications $20,000 to environment
  25. Donald and Astrid Monson Education Fund IncHonolulu, HI · tax year 2024 2 grants Accepts applications $17,000 to environment
  26. J Watumull FundHonolulu, HI · tax year 2024 8 grants Accepts applications $16,000 to environment
  27. Servco FoundationHonolulu, HI · tax year 2024 3 grants Accepts applications $16,000 to environment
  28. Ohuokalani Charitable FoundationAiea, HI · tax year 2024 1 grant Preselected only $15,000 to environment
  29. Bendon Family FoundationPaia, HI · tax year 2025 2 grants Preselected only $13,000 to environment
  30. The Earthshine FoundationKamuela, HI · tax year 2024 1 grant Accepts applications $10,000 to environment
  31. Garmar FoundationHonolulu, HI · tax year 2025 1 grant Preselected only $10,000 to environment
  32. Armstrong FoundationHonolulu, HI · tax year 2025 1 grant Accepts applications $10,000 to environment
  33. Dolores F Martin FoundationHonolulu, HI · tax year 2025 1 grant Accepts applications $10,000 to environment
  34. Elsie Wilcox FoundationHonolulu, HI · tax year 2025 3 grants Preselected only $10,000 to environment
  35. Aloha FoundationWaimanalo, HI · tax year 2025 3 grants Preselected only $9,500 to environment
  36. NA Hoaloha O Ka'aina LTDLahaina, HI · tax year 2024 1 grant Preselected only $9,446 to environment
  37. Michael J Marks FoundationHonolulu, HI · tax year 2025 3 grants Preselected only $9,000 to environment
  38. The Cades FoundationHonolulu, HI · tax year 2024 2 grants Accepts applications $8,000 to environment
  39. Grove Farm Company FoundationLihue, HI · tax year 2025 2 grants Accepts applications $6,000 to environment
  40. First Insurance Company of Hawaii Charitable FoundationHonolulu, HI · tax year 2025 2 grants Accepts applications $6,000 to environment
  41. A Charitable FoundationHaleiwa, HI · tax year 2025 3 grants Accepts applications $5,500 to environment
  42. Paul & Irene Buehner and Joan B Merrill Family FoundationLahaina, HI · tax year 2025 1 grant Accepts applications $5,000 to environment
  43. Central Pacific Bank FoundationHonolulu, HI · tax year 2025 1 grant Accepts applications $5,000 to environment
  44. The Paul and Karen Sullivan Family Charitable FoundationKailua, HI · tax year 2024 1 grant Preselected only $5,000 to environment
  45. Kualoa Ranch FoundationKaaawa, HI · tax year 2024 1 grant Preselected only $5,000 to environment
  46. Empowerment Fund of HonoluluHonolulu, HI · tax year 2024 1 grant Preselected only $5,000 to environment
  47. Locations FoundationHonolulu, HI · tax year 2024 1 grant Accepts applications $5,000 to environment
  48. M&P Ledbetter Family FoundationOahu, HI · tax year 2024 2 grants Preselected only $3,000 to environment
  49. Julia Temple Davis Brown FDNHonolulu, HI · tax year 2024 1 grant Accepts applications $3,000 to environment
  50. The Michael B Wood FoundationHonolulu, HI · tax year 2024 2 grants Accepts applications $2,000 to environment

Open to applications

25 foundations

The return gives an application contact and does not check the preselected-only box.

  1. Kosasa FoundationHonolulu, HI · tax year 2024 12 grants Accepts applications $948,888 to environment
  2. Harold KL Castle FoundationKailua, HI · tax year 2024 11 grants Accepts applications $247,500 to environment
  3. Frost Family FoundationHonolulu, HI · tax year 2024 3 grants Accepts applications $200,000 to environment
  4. The Strong FoundationHonolulu, HI · tax year 2024 1 grant Accepts applications $100,000 to environment
  5. Cooke Foundation LimitedHonolulu, HI · tax year 2024 5 grants Accepts applications $95,300 to environment
  6. Marshall & Yuko Hung FoundationHonolulu, HI · tax year 2025 3 grants Accepts applications $70,000 to environment
  7. First Hawaiian Bank FoundationHonolulu, HI · tax year 2024 3 grants Accepts applications $56,666 to environment
  8. Waimakua FoundationLihue, HI · tax year 2024 3 grants Accepts applications $52,000 to environment
  9. James & Abigail Campbell Family FoundationKapolei, HI · tax year 2024 1 grant Accepts applications $50,000 to environment
  10. The Clarence TC Ching FoundationHonolulu, HI · tax year 2024 2 grants Accepts applications $44,700 to environment
  11. AMA Olukai FoundationHonolulu, HI · tax year 2025 3 grants Accepts applications $42,000 to environment
  12. Fred Baldwin Memorial FoundationHonolulu, HI · tax year 2025 5 grants Accepts applications $35,000 to environment
  13. The Makana Aloha FoundationKailua, HI · tax year 2024 3 grants Accepts applications $28,000 to environment
  14. Bank of Hawaii Charitable FDNHonolulu, HI · tax year 2024 1 grant Accepts applications $20,000 to environment
  15. Donald and Astrid Monson Education Fund IncHonolulu, HI · tax year 2024 2 grants Accepts applications $17,000 to environment
  16. J Watumull FundHonolulu, HI · tax year 2024 8 grants Accepts applications $16,000 to environment
  17. Servco FoundationHonolulu, HI · tax year 2024 3 grants Accepts applications $16,000 to environment
  18. The Earthshine FoundationKamuela, HI · tax year 2024 1 grant Accepts applications $10,000 to environment
  19. Armstrong FoundationHonolulu, HI · tax year 2025 1 grant Accepts applications $10,000 to environment
  20. Dolores F Martin FoundationHonolulu, HI · tax year 2025 1 grant Accepts applications $10,000 to environment
  21. The Cades FoundationHonolulu, HI · tax year 2024 2 grants Accepts applications $8,000 to environment
  22. Grove Farm Company FoundationLihue, HI · tax year 2025 2 grants Accepts applications $6,000 to environment
  23. First Insurance Company of Hawaii Charitable FoundationHonolulu, HI · tax year 2025 2 grants Accepts applications $6,000 to environment
  24. A Charitable FoundationHaleiwa, HI · tax year 2025 3 grants Accepts applications $5,500 to environment
  25. Paul & Irene Buehner and Joan B Merrill Family FoundationLahaina, HI · tax year 2025 1 grant Accepts applications $5,000 to environment