Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofits in MAMARONECK, NY

129 tax-exempt organizations with a return on IRS file.

Largest nonprofits in MAMARONECK by revenue

Top 5s in MAMARONECK

Most raised in gifts and grants

Contributions, gifts and grants received in the year

  1. 1Human Development Services of Westchester990, year ended Dec 2025$11M
  2. 2White Lotus Philanthropy LTD990, year ended Dec 2024$7M
  3. 3Richard and Elizabeth Witten Fam Foundation990-PF, year ended May 2025$4.2M
  4. 4Mamaroneck Beach & Yacht Club & Spa Inc990, year ended Dec 2023$3.4M
  5. 5Hispanic Resource Center of Larchmont Mamaroneck Inc990, year ended Dec 2024$2.3M

Largest reserves

Net assets (fund balance) at year end

  1. 1Winged Foot Golf Club Inc990, year ended Dec 2024$34.1M
  2. 2French American School of New York Inc990, year ended Jun 2025$31.6M
  3. 3Richard and Elizabeth Witten Fam Foundation990-PF, year ended May 2025$8.6M
  4. 4Human Development Services of Westchester990, year ended Dec 2025$8M
  5. 5White Lotus Philanthropy LTD990, year ended Dec 2024$7.7M

Highest-paid people

Compensation from the organization and related organizations, including other pay

  1. 1Stephen RabideauDirector of Golf Courses · Winged Foot Golf Club Inc$652.5K
  2. 2Michael GilmoreHead Golf Professional · Winged Foot Golf Club Inc$584.7K
  3. 3Christopher MurrayGeneral Manager · Winged Foot Golf Club Inc$578.1K
  4. 4Francis GianniHead of School · French American School of New York Inc$539.7K
  5. 5Pascale ToothDir of Finance & Operations · French American School of New York Inc$410.1K

All nonprofits in MAMARONECK, A–Z (page 1 of 2)