Data / Nonprofits / Hawaii / Mutual and membership benefit
Mutual and membership benefit nonprofits in Hawaii: 75 registered with the IRS
75 mutual and membership benefit nonprofits are registered with the IRS in Hawaii, 10 of them 501(c)(3) charities; the 27 that report revenue took in $414.2 million. The most are in Honolulu (33), Mililani (9), Aiea (6). The largest by revenue: Kauai Island Utility Cooperative ($191.6 million), Sutter Insurance Services Corporation ($119.8 million), Ilwu Local 142 Health & Welfare Trust ($57 million).
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Every organization, largest by revenue first
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Kauai Island Utility Cooperative | Lihue | 501(c)(12) | 2002 | $191.6 million | $419.4 million | 2024-12 |
| Sutter Insurance Services Corporation | Honolulu | 501(c)(3) | 1993 | $119.8 million | $449.2 million | 2024-12 |
| Ilwu Local 142 Health & Welfare Trust | Honolulu | 501(c)(9) | 2009 | $57 million | $71.9 million | 2024-12 |
| Sand Island Business Association | Honolulu | 501(c)(4) | 2018 | $13.2 million | $24.8 million | 2025-06 |
| Ilwu Local 142 General Health & Welfare Trust | Honolulu | 501(c)(9) | 2010 | $8.6 million | $15.5 million | 2024-12 |
| Southern Oregon Insurance Inc | Honolulu | 501(c)(3) | 2006 | $6.3 million | $50.2 million | 2025-09 |
| Jas W Glover LTD Employees Welfare Benefit Plan | Honolulu | 501(c)(9) | 2026 | $3.7 million | $2.5 million | 2025-12 |
| Hawaii Tapers Vacation Trust Fund | Honolulu | 501(c)(9) | 2014 | $2.6 million | $1.6 million | 2024-12 |
| Hawaii Tapers Retiree Health Reimbursement Fund Trust | Honolulu | 501(c)(9) | 2015 | $2.2 million | $10.5 million | 2024-12 |
| Synergistic Hawaii Agriculture Council | Hilo | 501(c)(6) | 2014 | $2 million | $474,275 | 2024-12 |
| Kunia Water Association Inc | Kapolei | 501(c)(12) | 2011 | $1.3 million | $1.2 million | 2025-12 |
| Painting Industry of Hawaii Reserve Benefit Fund | Honolulu | 501(c)(9) | 2003 | $1.2 million | $11.3 million | 2025-06 |
| Moloaa Irrigation Cooperative | Anahola | 501(c)(12) | 2011 | $920,653 | $4.6 million | 2025-12 |
| Hawaii Residency Program Inc Trust for Professional Liability | Honolulu | 501(c)(3) | 1987 | $896,915 | $6 million | 2025-06 |
| Napu U Water Inc | Kailua Kona | 501(c)(12) | 2005 | $693,937 | $2.1 million | 2025-12 |
| Honolulu Police Relief Association Inc | Honolulu | 501(c)(9) | 2008 | $565,337 | $6 million | 2025-12 |
| CL&St Local Union 1926 Retiree Health Reimbursement Fund | Honolulu | 501(c)(9) | 2022 | $557,486 | $1.5 million | 2024-12 |
| Ilwu Local 142 Veba Trust | Honolulu | 501(c)(9) | 2009 | $268,447 | $6.5 million | 2024-12 |
| Waialua Water Association | Honolulu | 501(c)(12) | 2024 | $231,914 | $191,064 | 2025-12 |
| Ibew Local 1260 Insurance Trust | Honolulu | 501(c)(9) | 2018 | $149,355 | $1.1 million | 2025-09 |
| Kalihi Kai JLS | Honolulu | 501(c)(3) | 2009 | $112,243 | $1.8 million | 2024-12 |
| Hawaii Medical Service Association Retiree Health Benefits Trust | Honolulu | 501(c)(9) | 2006 | $75,783 | $60.8 million | 2024-12 |
| Young Brothers Limited Veba for Bargaining Unit Employees | Honolulu | 501(c)(9) | 2000 | $62,617 | $20.1 million | 2024-12 |
| Honolulu Fire Department Welfarefund | Honolulu | 501(c)(9) | 2006 | $61,460 | $789,864 | 2024-12 |
| Kalepa Koalition | Lihue | 501(c)(12) | 2014 | $18,440 | $51,129 | 2024-12 |
| Fraternal Order of Police Hawaii Lo Dge 1 | Aiea | 501(c)(8) | 1952 | $13,913 | $43,844 | 2024-12 |
| West Hawaii Veterans Cemetery Development and Exp | Waikoloa | 501(c)(3) | 2005 | $6,410 | $9,022 | 2025-12 |
| Ahahui Kaahumanu Chapter IV Wailuku Island of Maui | Kahului | 501(c)(8) | 1961 | $0 | $0 | 2024-12 |
| Aloha Chapter Holy Royal Arch Masons | Mililani | 501(c)(10) | 2008 | $0 | $0 | 2025-12 |
| Aloha Prince Hall Grand Commandery Knight Templar Jurisdiction of Hi | Mililani | 501(c)(10) | 2017 | $0 | $0 | 2025-09 |
| Consulting Engineers Council of Hawaii Administrative Support Grou | Honolulu | 501(c)(3) | 2023 | $0 | $0 | 2026-02 |
| Cosmopolitan Assembly No 16 | Aiea | 501(c)(8) | 2020 | $0 | $0 | 2025-12 |
| Daniel Chappie James Jr Lodge No 4 | Honolulu | 501(c)(10) | 2014 | $0 | $0 | 2025-12 |
| Free & Accepted Masons of Hawaii | Kapolei | 501(c)(10) | 2014 | $0 | $0 | 2024-12 |
| Free & Accepted Masons of Hawaii | Pearl City | 501(c)(8) | 2003 | $0 | $0 | 2025-12 |
| Hanalei Nihonjin Kai | Hanalei | 501(c)(13) | 2020 | $0 | $0 | 2025-12 |
| Hawaii Foundation for Performance Excellence | Mililani | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Hawaii Hung Mun Ghee Gung Tong | Kailua | 501(c)(8) | 2011 | $0 | $0 | 2025-12 |
| Hawaii Island Rental Property Alliance | Honolulu | 501(c)(6) | 2025 | $0 | $0 | 2025-12 |
| Hawaii Longshore Health and Welfare Trust Fund | Honolulu | 501(c)(9) | 2026 | |||
| Hook Chu Cemetery Association | Honolulu | 501(c)(13) | 2022 | $0 | $44,283 | 2025-12 |
| Hugues de Payens Guild No 20 | Aiea | 501(c)(10) | 2014 | $0 | $0 | 2025-12 |
| Hui Loke Kea | Mililani | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Iatse Local 665 Training Trust Fund | Honolulu | 501(c)(9) | 2009 | $0 | $0 | 2025-12 |
| Ibew Local 1357 Insurance Trust | Honolulu | 501(c)(9) | 2014 | $0 | $0 | 2025-09 |
| Icf Hawaii Chapter | Honolulu | 501(c)(6) | 2024 | $0 | $0 | 2025-12 |
| JBPHH Fcpoa | Pearl City | 501(c)(3) | 2025 | |||
| Jannah Shriner Temple | Pearl City | 501(c)(10) | 2014 | $0 | $0 | 2025-12 |
| Kaahumanu Society of Honolulu CH 1 | Hana | 501(c)(8) | 2024 | $0 | $0 | 2025-12 |
| Kahaupali Memorial Association | Kahului | 501(c)(13) | 2005 | $0 | $0 | 2025-12 |
| Kapoho Kai Water Association | Keaau | 501(c)(12) | 2008 | $0 | $0 | 2025-12 |
| Kaukonahua Hoola Water Association | Haleiwa | 501(c)(12) | 2020 | $0 | $0 | 2025-12 |
| Keawe Ehu-Campbell Family Cemetery Inc | Kamuela | 501(c)(13) | 2014 | $0 | $0 | 2025-12 |
| Kilauea Japanese Association Inc | Kilauea | 501(c)(13) | 2007 | $0 | $0 | 2025-12 |
| Knights Templar of the United States of America | Honolulu | 501(c)(10) | 1964 | $0 | $0 | 2025-06 |
| Knights of Columbus | Honolulu | 501(c)(8) | 1940 | $0 | $0 | 2024-12 |
| Knights of Columbus | Honolulu | 501(c)(8) | 1940 | $0 | $0 | 2024-12 |
| Knights of Columbus | Waianae | 501(c)(8) | 1940 | $0 | $0 | 2025-12 |
| Knights of Columbus | Kapolei | 501(c)(8) | 1940 | $0 | $0 | 2025-12 |
| Lahela Court Locop | Aiea | 501(c)(10) | 2017 | $0 | $0 | 2025-12 |
| Leeward Lodge Free and Accepted Masons | Ewa Beach | 501(c)(10) | 2023 | $0 | $0 | 2024-12 |
| Mayoral Transition Committee | Honolulu | 501(c)(4) | 2014 | $0 | $0 | 2025-12 |
| Mechanical Contractors Workers Compensation Self Ins Group | Honolulu | 501(c)(15) | 2003 | |||
| Moriah Council No 4 Royal & Select Masters | Mililani | 501(c)(4) | 2012 | $0 | $0 | 2025-12 |
| Most Excellent Aloha Prince Hall Grand Chapter Hram Jurisdiction of | Mililani | 501(c)(10) | 2017 | $0 | $0 | 2025-09 |
| Most Illustrious Aloha Prince Hall Grand Council R&SM of Hawaii | Mililani | 501(c)(10) | 2017 | $0 | $0 | 2025-09 |
| Most Worshipful Prince Hall Free & Accepted Masons of Hawaii Inc | Mililani | 501(c)(8) | 2003 | $0 | $0 | 2024-12 |
| New Hope Chapter No 2 | Mililani | 501(c)(8) | 2009 | $0 | $0 | 2025-12 |
| Paradise Grand High Court Hoj Jurisdiction of Hawaii Pha | Aiea | 501(c)(10) | 2025 | $0 | $0 | 2025-12 |
| Prince Hall Grand Chapter Oes State of Hawaii and Its Jurisdiction | Pearl City | 501(c)(8) | 2016 | $0 | $0 | 2026-05 |
| Princess Kala Grand Court Locop Jurisdiction of Hawaii | Aiea | 501(c)(10) | 2022 | $0 | $0 | 2025-12 |
| Takbir Temple N 227 | Wahiawa | 501(c)(10) | 2022 | $0 | $0 | 2025-12 |
| Trustees Hawaii Electrical Utility Workers Vacation and Holiday Fund | Honolulu | 501(c)(9) | 2024 | $0 | $0 | 2024-12 |
| Vivian V Rich Hill Chapter No 4 Order of the Eastern Star | Pearl City | 501(c)(10) | 2019 | $0 | $0 | 2025-12 |
| Waiehu Chinese Cemetery Association | Wailuku | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.