| 1 | East End Disability Associates INC | Human Services | $41.1M | $17.8M |
| 2 | Aid to the Developmentally Disabled INC | Human Services | $33.4M | $15.5M |
| 3 | Robert David Lion Gardiner Foundation INC | Unclassified | $30.1M | $115.1M |
| 4 | Timothy Hill Childrens Ranch INC | Human Services | $17.6M | $19.1M |
| 5 | Laurents Hatcher Foundation INC | Unclassified | $9.3M | $21.4M |
| 6 | Central Suffolk Hospital Foundation | Health Care | $9.0M | $58.8M |
| 7 | Corey Foundation | Philanthropy, Voluntarism & Grantmaking | $6.0M | $26.8M |
| 8 | Riverhead Free Library | Education | $5.8M | $10.9M |
| 9 | William and Mary Stark Family Foundation INC | Philanthropy, Voluntarism & Grantmaking | $3.0M | $3.0M |
| 10 | Riverhead Volunteer Ambulance Corps INC | Health Care | $2.2M | $2.7M |
| 11 | Riverhead Lodge No 1742 Loyal Order of Moose | Unclassified | $2.0M | $1.2M |
| 12 | Iglesia la Nueva Jerusalen | Unclassified | $1.5M | $9.5M |
| 13 | Riverhead Community Awareness Program INC | Unclassified | $1.4M | $509K |
| 14 | The Flanders Northampton Volunteer Ambulance Company INC | Health Care | $1.3M | $635K |
| 15 | Roma M Karp Foundation INC | Philanthropy, Voluntarism & Grantmaking | $1.1M | $3.1M |
| 16 | Riverhead Central Faculty Association Benefit Trust Fund | Mutual & Membership Benefit | $966K | $1.7M |
| 17 | John Wesley Village II INC | Housing & Shelter | $958K | $8.0M |
| 18 | Riverhead Foundation for Marine Research and Preservation | Animal-Related | $860K | $997K |
| 19 | East End Arts & Humanities Council | Unclassified | $780K | $187K |
| 20 | Free & Accepted Masons of New York | Unclassified | $764K | $2.8M |
| 21 | Butterfly Effect Project INC | Youth Development | $630K | $83K |
| 22 | Suffolk County Historical Society | Arts, Culture & Humanities | $606K | $2.2M |
| 23 | American Federation of Teachers | Unclassified | $593K | $497K |
| 24 | Hallockville INC | Arts, Culture & Humanities | $508K | $1.5M |
| 25 | Riverhead Rotary Charities INC | Human Services | $478K | $819K |
| 26 | The Place for Learning INC | Education | $441K | $5.7M |
| 27 | Maureens Haven INC | Community Improvement & Capacity Building | $441K | $439K |
| 28 | Spirits Promise Equine Rescue Corp. | Animal-Related | $434K | $268K |
| 29 | Housing America Foundation | Housing & Shelter | $413K | $2.6M |
| 30 | Riverhead Volunteer Firefighters Association INC | Public Safety, Disaster Preparedness & Relief | $406K | $1.3M |
| 31 | Riverhead Cemetery Association | Unclassified | $355K | $842K |
| 32 | Riverhead Police Benevolent Association INC | Unclassified | $318K | $345K |
| 33 | North Fork Breast Health Coalition INC | Arts, Culture & Humanities | $318K | $359K |
| 34 | Gertrude and Leonard McCombe Foundaiton | Philanthropy, Voluntarism & Grantmaking | $277K | $1.6M |
| 35 | Veterans of Foreign Wars Rensselae | Unclassified | $260K | $384K |
| 36 | Lt Michael P Murphy Usn Memorial Scholarship Foundation | Education | $238K | $983K |
| 37 | Gwen L Kosinski Foundation INC | Medical Research | $216K | $236K |
| 38 | Ravenswood Charitable Foundation | Employment | $206K | $610K |
| 39 | Rotary International District 7255 | Community Improvement & Capacity Building | $185K | $283K |
| 40 | Suffolk County Correction Officers Benevolent Association INC | Unclassified | $174K | $153K |
| 41 | East End Tourism Alliance INC | Community Improvement & Capacity Building | $170K | $19K |
| 42 | Riverhead Business Improvement District Management Assoc INC | Community Improvement & Capacity Building | $167K | $122K |
| 43 | Forget Me Not of America INC | Mental Health & Crisis Intervention | $156K | $382K |
| 44 | Sound Justice Initiative INC | Unclassified | $152K | $12K |
| 45 | Imagine Special Equestrians INC | Human Services | $149K | $60K |
| 46 | Riverhead Chamber of Commerce | Unclassified | $138K | $103K |
| 47 | Benevolent & Protective Order of Elks of the USA | Unclassified | $135K | $55K |
| 48 | Flanders Riverside and Northampton Community Association INC | Community Improvement & Capacity Building | $117K | $22K |
| 49 | Family Community Life Center INC | Recreation & Sports | $113K | $72K |
| 50 | Rotary District 7255 Foundation INC | Community Improvement & Capacity Building | $112K | $34K |
| 51 | Rotary International | Unclassified | $109K | $93K |
| 52 | I R I E Therapeutic Equestrian Program | Education | $103K | $51K |
| 53 | Humane Long Island | Animal-Related | $99K | $28K |
| 54 | Restoration Christian Fellowship INC | Religion-Related | $98K | $60K |
| 55 | Empire State Huskies Long Island INC | Unclassified | $87K | $35K |
| 56 | Dr Lazarus Onwuka Medical Foundation INC | Health Care | $85K | $3K |
| 57 | Long Island Antique Power Association | Arts, Culture & Humanities | $75K | $482K |
| 58 | Whr Charities INC | Philanthropy, Voluntarism & Grantmaking | $74K | $70K |
| 59 | Little League Baseball INC | Youth Development | $69K | $6K |
| 60 | East End Counselors Association INC | Education | $63K | $61K |
| 61 | Long Island Buddhist Meditation Center | Religion-Related | $56K | $222K |
| 62 | Hope and Resilience Long Island INC | Crime & Legal-Related | $50K | $12K |
| 63 | Friends of the Riverhead Free Library INC | Education | $45K | $74K |
| 64 | Iglesia Apostolica Eden Efesios 220 | Religion-Related | $42K | $176K |
| 65 | Open Arms Care Center INC | Human Services | $39K | $25K |
| 66 | Riverhead Townscape INC | Unclassified | $32K | $40K |
| 67 | Eastern Long Island Quilters Guild | Unclassified | $32K | $30K |
| 68 | Long Island Wine Council INC | Unclassified | $26K | $104K |
| 69 | Johannas Hope INC | Human Services | $21K | $17K |
| 70 | Our Future Generation | Arts, Culture & Humanities | $21K | $19K |
| 71 | Heidis Helping Angels | Human Services | $19K | $12K |
| 72 | Indian Network of Eastern Long Island INC | Arts, Culture & Humanities | $9K | $9K |
| 73 | Eastern Long Island Antique Fire Apparatus Association | Education | $8K | $22K |
| 74 | Timothy Foundation INC | Community Improvement & Capacity Building | $6K | $1.1M |
| 75 | Double C Family Foundation | Philanthropy, Voluntarism & Grantmaking | $1K | $38K |
| 76 | Harvest East End INC | Human Services | $1K | $29K |
| 77 | Spay Alter Vaccinate Every Stray INC | Animal-Related | $40 | $33K |
| 78 | Meridian Triangle 71 | Youth Development | $1 | $3K |
| 79 | Iglesia Pentecostal Familia de Dios | Unclassified | $0 | $0 |
| 80 | River Head Garden Club | Environment | $0 | $0 |
| 81 | Long Island District of New York State Assoc of Fam & Consumer Scie | Food, Agriculture & Nutrition | $0 | $0 |
| 82 | Restoration First Assembly of God | Unclassified | $0 | $0 |
| 83 | Peconic United Methodist Housing Development Fund Company INC | Housing & Shelter | $0 | $5.5M |
| 84 | Living Water Full Gospel Church INC | Unclassified | $0 | $0 |
| 85 | Savant Garde Institute Ltd | Unclassified | $0 | $0 |
| 86 | Council for the Vail-leavitt Music Hall INC | Unclassified | $0 | $0 |
| 87 | Paumanok Weavers Guild | Unclassified | $0 | $0 |
| 88 | Church of the Harvest | Unclassified | $0 | $0 |
| 89 | Community Bible Church | Unclassified | $0 | $0 |
| 90 | East End Womens Network INC | Social Science | $0 | $0 |
| 91 | Riverhead Faculty and Community Theatre INC | Unclassified | $0 | $0 |
| 92 | Civil Service Employees Association | Unclassified | $0 | $0 |
| 93 | Civil Service Employees Association | Unclassified | $0 | $0 |
| 94 | Civil Service Employees Association | Unclassified | $0 | $0 |
| 95 | Riverhead Southam Cmnty Center | Unclassified | $0 | $0 |
| 96 | House of Praise Christian Revival Center INC | Unclassified | $0 | $0 |
| 97 | Power of Prayer Ministry | Religion-Related | $0 | $0 |
| 98 | New Life Ministries | Unclassified | $0 | $0 |
| 99 | Friendship Baptist Church of Riverhead | Religion-Related | $0 | $0 |
| 100 | Church of God | Unclassified | $0 | $0 |