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Funding search · EIN 516016471 · Valley Stream, NY

O'Donnell Iselin Foundation

A private foundation (files IRS Form 990-PF). Most private foundations do not take unsolicited applications; the route in is usually a program officer.

126
grants reported
$793,500
total given
2022–2025
filing years
$3,000
median grant

Based on grants this organization reported to the IRS for tax years 2022–2025. This is what they filed, not a complete record of their giving, and recent years may be incomplete because filings lag.

What they fund

recipientcharitiesfor

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Funding pattern

What this funder pays for, at what size, and how to position adjacent work. Read from their filings, with every number checked against the record.

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Top recipients

Repeat recipients are the strongest signal of whether a funder has an open door or quietly re-funds the same organizations.

  • St Timothy'S School4 grants · $100,000
  • New York Botanical Garden4 grants · $100,000
  • Woods Hole Oceanographic Institute4 grants · $70,000
  • Greenwich Land Trust4 grants · $50,000
  • Planned Parenthood of Southern New England4 grants · $45,000
  • Planned Parenthood of Greater New York4 grants · $45,000
  • The Montessori School4 grants · $40,000
  • St Hilda'S & St Hugh'S School4 grants · $40,000
  • Spence Chapin4 grants · $40,000
  • The Montessori School Endowment Fund4 grants · $40,000

Giving over time

$198,000
2022
$211,500
2023
$187,500
2024
$196,500
2025

Grant history

The 100 largest of 126 grants.

  • $25,000

    New York Botanical Garden · Bronx, NY · 2025

    For general purposes of recipient charities

  • $25,000

    St Timothy'S School · Stevenson, MD · 2025

    For general purposes of recipient charities

  • $25,000

    New York Botanical Garden · Bronx, NY · 2024

    For general purposes of recipient charities

  • $25,000

    St Timothy'S School · Stevenson, MD · 2024

    For general purposes of recipient charities

  • $25,000

    New York Botanical Garden · Bronx, NY · 2023

    For general purposes of recipient charities

  • $25,000

    St Timothy'S School · Stevenson, MD · 2023

    For general purposes of recipient charities

  • $25,000

    New York Botanical Garden · Bronx, NY · 2022

    For general purposes of recipient charities

  • $25,000

    St Timothy'S School · Stevenson, MD · 2022

    For general purposes of recipient charities

  • $20,000

    Greenwich Land Trust · Greenwich, CT · 2023

    For general purposes of recipient charities

  • $20,000

    Woods Hole Oceanographic Institute · Woods Hole, MA · 2023

    For general purposes of recipient charities

  • $20,000

    Woods Hole Oceanographic Institute · Woods Hole, MA · 2022

    For general purposes of recipient charities

  • $15,000

    Woods Hole Oceanographic Institute · Woods Hole, MA · 2025

    For general purposes of recipient charities

  • $15,000

    Woods Hole Oceanographic Institute · Woods Hole, MA · 2024

    For general purposes of recipient charities

  • $15,000

    Planned Parenthood of Greater New York · New York, NY · 2022

    For general purposes of recipient charities

  • $15,000

    Planned Parenthood of Southern New England · New Haven, CT · 2022

    For general purposes of recipient charities

  • $10,000

    Greenwich Land Trust · Greenwich, CT · 2025

    For general purposes of recipient charities

  • $10,000

    Planned Parenthood of Greater New York · New York, NY · 2025

    For general purposes of recipient charities

  • $10,000

    Planned Parenthood of Southern New England · New Haven, CT · 2025

    For general purposes of recipient charities

  • $10,000

    Spence Chapin · New York, NY · 2025

    For general purposes of recipient charities

  • $10,000

    St Hilda'S & St Hugh'S School · New York, NY · 2025

    For general purposes of recipient charities

  • $10,000

    The Montessori School · Wilton, CT · 2025

    For general purposes of recipient charities

  • $10,000

    The Montessori School Endowment Fund · Wilton, CT · 2025

    For general purposes of recipient charities

  • $10,000

    Greenwich Land Trust · Greenwich, CT · 2024

    For general purposes of recipient charities

  • $10,000

    Planned Parenthood of Greater New York · New York, NY · 2024

    For general purposes of recipient charities

  • $10,000

    Planned Parenthood of Southern New England · New Haven, CT · 2024

    For general purposes of recipient charities

  • $10,000

    Spence Chapin · New York, NY · 2024

    For general purposes of recipient charities

  • $10,000

    St Hilda'S & St Hugh'S School · New York, NY · 2024

    For general purposes of recipient charities

  • $10,000

    The Montessori School · Wilton, CT · 2024

    For general purposes of recipient charities

  • $10,000

    The Montessori School Endowment Fund · Wilton, CT · 2024

    For general purposes of recipient charities

  • $10,000

    Planned Parenthood of Greater New York · New York, NY · 2023

    For general purposes of recipient charities

  • $10,000

    Planned Parenthood of Southern New England · New Haven, CT · 2023

    For general purposes of recipient charities

  • $10,000

    Spence Chapin · New York, NY · 2023

    For general purposes of recipient charities

  • $10,000

    St Hilda'S & St Hugh'S School · New York, NY · 2023

    For general purposes of recipient charities

  • $10,000

    The Montessori School · Wilton, CT · 2023

    For general purposes of recipient charities

  • $10,000

    The Montessori School Endowment Fund · Wilton, CT · 2023

    For general purposes of recipient charities

  • $10,000

    Greenwich Land Trust · Greenwich, CT · 2022

    For general purposes of recipient charities

  • $10,000

    Spence Chapin · New York, NY · 2022

    For general purposes of recipient charities

  • $10,000

    St Hilda'S & St Hugh'S School · New York, NY · 2022

    For general purposes of recipient charities

  • $10,000

    The Montessori School · Wilton, CT · 2022

    For general purposes of recipient charities

  • $10,000

    The Montessori School Endowment Fund · Wilton, CT · 2022

    For general purposes of recipient charities

  • $5,000

    Aspca · New York, NY · 2025

    For general purposes of recipient charities

  • $5,000

    Connecticut Food Bank · Wallingford, CT · 2025

    For general purposes of recipient charities

  • $5,000

    North Country School Scholarship · Lake Placid, NY · 2025

    For general purposes of recipient charities

  • $5,000

    Redding Land Trust · Redding, CT · 2025

    For general purposes of recipient charities

  • $5,000

    United Church of Rowayton · Norwalk, CT · 2025

    For general purposes of recipient charities

  • $5,000

    Connecticut Food Bank · Wallingford, CT · 2024

    For general purposes of recipient charities

  • $5,000

    North Country School Scholarship · Lake Placid, NY · 2024

    For general purposes of recipient charities

  • $5,000

    Redding Land Trust · Redding, CT · 2024

    For general purposes of recipient charities

  • $5,000

    United Church of Rowayton · Norwalk, CT · 2024

    For general purposes of recipient charities

  • $5,000

    All Hands and Hearts · Mattapoisett, MA · 2023

    For general purposes of recipient charities

  • $5,000

    Connecticut Food Bank · Wallingford, CT · 2023

    For general purposes of recipient charities

  • $5,000

    North Country School Scholarship · Lake Placid, NY · 2023

    For general purposes of recipient charities

  • $5,000

    Redding Land Trust · Redding, CT · 2023

    For general purposes of recipient charities

  • $5,000

    United Church of Rowayton · Norwalk, CT · 2023

    For general purposes of recipient charities

  • $5,000

    North Country School Scholarship · Lake Placid, NY · 2022

    For general purposes of recipient charities

  • $5,000

    Redding Land Trust · Redding, CT · 2022

    For general purposes of recipient charities

  • $5,000

    United Church of Rowayton · Rowayton, CT · 2022

    For general purposes of recipient charities

  • $4,000

    Aspca · New York, NY · 2022

    For general purposes of recipient charities

  • $3,000

    Person To Person · Darien, CT · 2025

    For general purposes of recipient charities

  • $3,000

    Person To Person · Darien, CT · 2024

    For general purposes of recipient charities

  • $3,000

    Doctors Without Borders · New York, NY · 2023

    For general purposes of recipient charitiesfor general purposes of recipient charities

  • $3,000

    Lockwood-Mathews Manison Museum · Norwalk, CT · 2023

    For general purposes of recipient charities

  • $3,000

    Person To Person · Darien, CT · 2023

    For general purposes of recipient charities

  • $3,000

    Doctors Without Borders · New York, NY · 2022

    For general purposes of recipient charitiesfor general purposes of recipient charities

  • $3,000

    Silvermine Guild Arts Center · New Canaan, CT · 2022

    For general purposes of recipient charities

  • $2,500

    All Hands and Hearts · Mattapoisett, MA · 2025

    For general purposes of recipient charities

  • $2,500

    Americares Foundation · Stamford, CT · 2025

    For general purposes of recipient charities

  • $2,500

    Doctors Without Borders · New York, NY · 2025

    For general purposes of recipient charities

  • $2,500

    Dorothy Day Hospitality House · Danbury, CT · 2025

    For general purposes of recipient charities

  • $2,500

    Kisma Preserve · Mt Desert, ME · 2025

    For general purposes of recipient charities

  • $2,500

    Lockwood-Mathews Manison Museum · Norwalk, CT · 2025

    For general purposes of recipient charities

  • $2,500

    Mark Twain Library · West Redding, CT · 2025

    For general purposes of recipient charities

  • $2,500

    St Bartholemew'S Church · New York, NY · 2025

    For general purposes of recipient charities

  • $2,500

    The Elephant Sanctuary · Hohenwald, TN · 2025

    For general purposes of recipient charities

  • $2,500

    All Hands and Hearts · Mattapoisett, MA · 2024

    For general purposes of recipient charities

  • $2,500

    Americares Foundation · Stamford, CT · 2024

    For general purposes of recipient charities

  • $2,500

    Aspca · New York, NY · 2024

    For general purposes of recipient charities

  • $2,500

    Doctors Without Borders · New York, NY · 2024

    For general purposes of recipient charitiesfor general purposes of recipient charities

  • $2,500

    Kisma Preserve · Mt Desert, ME · 2024

    For general purposes of recipient charities

  • $2,500

    Lockwood-Mathews Manison Museum · Norwalk, CT · 2024

    For general purposes of recipient charities

  • $2,500

    Mark Twain Library · West Redding, CT · 2024

    For general purposes of recipient charities

  • $2,500

    St Bartholemew'S Church · New York, NY · 2024

    For general purposes of recipient charities

  • $2,500

    The Elephant Sanctuary · Hohenwald, TN · 2024

    For general purposes of recipient charities

  • $2,500

    Americares Foundation · Stamford, CT · 2023

    For general purposes of recipient charities

  • $2,500

    Aspca · New York, NY · 2023

    For general purposes of recipient charities

  • $2,500

    Dorothy Day Hospitality House · Danbury, CT · 2023

    For general purposes of recipient charities

  • $2,500

    Kisma Preserve · Mt Desert, ME · 2023

    For general purposes of recipient charities

  • $2,500

    Mark Twain Library · West Redding, CT · 2023

    For general purposes of recipient charities

  • $2,500

    St Bartholemew'S Church · New York, NY · 2023

    For general purposes of recipient charities

  • $2,500

    The Elephant Sanctuary · Hohenwald, TN · 2023

    For general purposes of recipient charities

  • $2,500

    Americares Foundation · Stamford, CT · 2022

    For general purposes of recipient charities

  • $2,500

    Dorothy Day Hospitality House · Danbury, CT · 2022

    For general purposes of recipient charities

  • $2,500

    Kisma Preserve · Mt Desert, ME · 2022

    For general purposes of recipient charities

  • $2,500

    Mark Twain Library · West Redding, CT · 2022

    For general purposes of recipient charities

  • $2,500

    The Elephant Sanctuary · Hohenwald, TN · 2022

    For general purposes of recipient charities

  • $2,000

    Connecticut Fund for the Environment · New Haven, CT · 2025

    For general purposes of recipient charities

  • $2,000

    Kieve-Wavus Education · Nobleboro, ME · 2025

    For general purposes of recipient charities

  • $2,000

    Stamford Hospital Foundation · Stamford, CT · 2025

    For general purposes of recipient charities

  • $2,000

    Kieve-Wavus Education · Nobleboro, ME · 2024

    For general purposes of recipient charities

  • $2,000

    Kieve-Wavus Education · Nobleboro, ME · 2023

    For general purposes of recipient charities

View all 126 grants →

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Source: IRS Form 990-PF, Part XV, as filed by the foundation. These are grants already paid — a record of what this funder backs, not an open call.