Samuel N. & Mary Castle Foundation

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Committed to improving the lives of Hawaii's children and families by improving early education.

Applicants can choose from ten RFPs in 2027, offering more funding opportunities than ever.

President Dr. Kittredge Baldwin writes about the Foundation's standing and progress.

Learn about our priorities, what we look for in an application, and what we do not fund.

View grants made by the Samuel N. & Mary Castle Foundation over the last three years.

Next application due date is Tuesday, September 1, 2026 for the December 3, 2026 trustee meeting.

Find about Saint Louis, Missouri-based Pettus Foundation’s work in Hawaii.
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Special publication issue on Castle Foundation–sponsored programs (S.E.L.).
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Immediate support for organizations providing relief to the public in times of dire need.
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| 733 Bishop Street, Suite 1275, Honolulu, HI 96813 | (808) 522-1101 | castlefdn@gmail.com