Foundations that fund organizations in Islip, New York
Worked out from where the grants went, not where the foundations sit.
Funding landscape for Islip nonprofits
28 private foundations gave $649K to Islip organizations in their latest filings; 8 of the 27 that say either way accept applications.
34 grants in total, with a typical foundation's median grant to Islip around $2,500. 23 of these funders are based in New York; the rest give here from elsewhere.
- Foundations giving here
- 28
- Accept applications
- 8
- of 27 that state a policy
- Dollars to Islip
- $649K
- latest filings
- Grants
- 34
- Typical median grant
- $2,500
- Based in NY
- 82%
- of funders listed
Funders, by dollars given to Islip organizations
| Foundation | Based in | Grants here | Dollars here | Median | Accepts applications | Typical purposes |
|---|---|---|---|---|---|---|
| John C Dunphy Private Foundation Inc | Albany, NY | 2 | $300K | $150K | Preselected only | Religious; Board-approved May 2025 |
| Sarah Decoizart Perpetual Charitable Tr | Chicago, IL | 1 | $60K | $60K | Yes | General support |
| H Auerbach Est H Auerbach Mem Fd Tr #2 | New York, NY | 1 | $56K | $56K | Preselected only | General support purposes |
| Island Outreach Foundation Inc | Center Moriches, NY | 1 | $53K | $53K | Preselected only | Charitable contribution |
| Knapp-Swezey Foundation Inc | Patchogue, NY | 1 | $53K | $53K | Yes | Charitable contribution |
| The Klein-Kaufman Family Foundation | Huntington, NY | 2 | $43K | $22K | Preselected only | Economic assistance |
| Maude Pritchard Char Trust Xxxxx2009 | Chicago, IL | 1 | $30K | $30K | Yes | General operating |
| The Whelan Foundation Inc | Huntington, NY | 1 | $10K | $10K | Preselected only | Various childrens activities |
| Clark Gillies Foundation | Farmingdale, NY | 1 | $7,000 | $7,000 | Yes | Non-profit organization |
| Educational Projects Foundation Inc | New York, NY | 1 | $5,000 | $5,000 | Preselected only | To further wildlife education and conservation |
| Lucille T Stretch and George J Stretch Charitable Foundation Inc | Ridge, NY | 1 | $5,000 | $5,000 | Yes | Childrens health |
| Navigating the Journey Ltd | Islip, NY | 1 | $4,616 | $4,616 | Not stated | Housing and transpotation assistance |
| T O Family Foundation | Floral Park, NY | 2 | $3,000 | $1,500 | Preselected only | General support |
| The Dorfman and Kaish Family Foundation | New York, NY | 1 | $2,500 | $2,500 | Preselected only | Charitable contribution |
| Charles L Read Foundation C/O Saul Eisenberg Treasurer | Bayshore, NY | 1 | $2,500 | $2,500 | Yes | Purchase of capital items |
| Bravest Lacrosse Club Inc | Bellmore, NY | 1 | $2,000 | $2,000 | Preselected only | Charitible Contribution |
| Jefferson Family Charitable Foundation | Charlottesville, VA | 1 | $2,000 | $2,000 | Preselected only | General |
| Al & Peggy Dematteis Family Foundation C/O Keith Dematteis Director | Manhasset, NY | 3 | $1,975 | $375 | Yes | General charitable funding |
| Robert David Lion Gardiner Foundation Inc | Riverhead, NY | 1 | $1,600 | $1,600 | Yes | 2025 gardiner young scholar |
| The Ferrandino Family Charity Inc | Farmingdale, NY | 1 | $1,500 | $1,500 | Preselected only | Charitable purposes |
| Ruth Winkelman Wender Foundation | Wilmington, DE | 1 | $1,500 | $1,500 | Preselected only | General operations |
| The Schaefer Foundation | Ponte Verda Beach, FL | 1 | $1,000 | $1,000 | Preselected only | Charitable |
| Jesse Gerhard Memorial Foundation | Islip, NY | 2 | $916 | $458 | Preselected only | To be donated to islip family with medical; To aid first responders |
| The Tcherepnine Foundation Inc | Brooklyn, NY | 1 | $500 | $500 | Preselected only | Conservation long island's wildlife and the environment. |
| Andrew Desiderio Memorial Scholarship Fund Inc | Williston Park, NY | 1 | $500 | $500 | Preselected only | Award gear donation |
| Luanne and Dan Chefetz Charitable Foundation | West Islip, NY | 1 | $500 | $500 | Preselected only | General contribution |
| Dahab Family Foundation Inc | Brightwaters, NY | 1 | $35 | $35 | Preselected only | Charitable |
| Robert J Laskowski Foundation C/O Orange Bank & Trust Company | Middletown, NY | 1 | — | Preselected only | To futher purpose of charity |
Source: IRS Form 990-PF Part XV, latest electronic return per foundation (2026-10-28). "Accepts applications" reflects the foundation's own checkbox on Part XV line 2. Grants to individuals excluded.
Common questions
Which foundations give to nonprofits in Islip, New York?
John C Dunphy Private Foundation Inc, Sarah Decoizart Perpetual Charitable Tr, H Auerbach Est H Auerbach Mem Fd Tr #2, Island Outreach Foundation Inc, Knapp-Swezey Foundation Inc and 23 others reported grants to Islip organizations on their latest Form 990-PF.
How do I approach a foundation that doesn't accept applications?
A foundation that checks "contributes only to preselected organizations" on its 990-PF won't review a cold proposal. Look at who it funds, find a shared board member, grantee or advisor, and ask for an introduction. Foundations that accept applications usually list a contact and deadlines in Part XV; we show that text on each foundation's page.
Is this list complete?
No. It covers private foundations (Form 990-PF filers) whose latest electronic return lists at least one grant to an organization in Islip. Community foundations and corporate giving programs file different forms and are not included yet.