Robert Glenn Rapp Foundation
The Robert Glenn Rapp Foundation's official website (rappok.org) presents foundation history, funding priorities, trustee listings, a grant request portal, and contact details. The site uses [email protected] and an Oklahoma City address that match public records.
Source: Website · Mar 2026
Ideal Applicant
A registered 501(c)(3) nonprofit, primarily based in Oklahoma or serving Oklahoma communities, seeking funding for capital projects, endowments, K–12 or higher-education initiatives, human services, youth programs, arts/culture, or health-related facility upgrades, and able to submit a required Letter of Inquiry during the April–May window.
Good Fit
- • Project- or capital-focused requests (construction, renovation, equipment, endowment).
- • Education, youth development, human services, women's shelter, or health-related program alignment.
- • Ability to submit a Letter of Inquiry through the online portal during the specified window.
- • 501(c)(3) status and readiness to be the single annual applicant from the organization.
Geography
Observed giving is strongly concentrated in Oklahoma, which received roughly four-fifths of the foundation's dollars in the latest year, though smaller grants reached a handful of other states.
Recipient Variety
The foundation funded dozens of independent organizations each year (47 distinct recipients in the latest year and 55–62 in prior years) across education, human services, arts, health, and youth development, indicating a broad recipient set for its size.
New Applicants
A clear public application pathway exists (online LOI portal with defined dates) and the foundation funded new organizations each year (for example 15 new recipients in the latest year and 41 in 2023), so unfamiliar applicants can plausibly enter the portfolio if they meet eligibility and timing requirements.
Source: Zeffy Agent · Mar 2026
