Nonprofits in Smithtown, NY
501(c)(3) nonprofit organizations — IRS Exempt Organizations Business Master File (2026-02)
Overview
Source: IRS Exempt Organizations BMFTotal Nonprofits
141
Total Assets
$453.2M
Orgs with >$1M Assets
12
Per 10K Residents
56.5
nonprofits
-3.9% vs 10K-25K avg
Nonprofits by Category
Source: IRS / NTEE ClassificationHuman Services17
Education15
Recreation & Sports14
Religion11
Philanthropy10
Arts & Culture7
Environment5
Animal-Related5
Voluntary Health4
Public Benefit4
Food & Agriculture3
Community Improvement3
Health Care2
Housing & Shelter2
Public Safety2
Civil Rights2
Mental Health1
Medical Research1
Employment1
Youth Development1
Science & Tech1
Nonprofits per 10K Residents vs Similar Cities
Source: IRS BMF + Census ACSCompared to cities with population 10,000 - 25,000
Largest Nonprofits in Smithtown
Source: IRS Exempt Organizations BMF| Organization | Category | Assets | Income | Est. |
|---|---|---|---|---|
| ST CATHERINE OF SIENA MEDICAL CENTER | Health Care | $214.1M | $281.0M | 1946 |
| DEVELOPMENTAL DISABILITIES INSTITUTE INC | Human Services | $102.2M | $159.9M | 1967 |
| GUIDE DOG FOUNDATION FOR THE BLIND INC | — | $63.5M | $40.2M | 1950 |
| SCOPE EDUCATION SERVICES | Education | $27.0M | $44.9M | 1965 |
| BANYAN TREE ROOTS FOUNDATION | Philanthropy | $10.0M | $18.0M | 2019 |
| HUMAN POTENTIAL FOUNDATION | — | $8.7M | $263K | 1985 |
| HILDENBRAND FAMILY FOUNDATION | Philanthropy | $5.3M | $840K | 2011 |
| AMERICAS VETDOGS THE VETERANS K9 CORPS INC | Public Benefit | $4.6M | $10.9M | 2007 |
| SMITHTOWN HISTORICAL SOCIETY | Arts & Culture | $2.7M | $538K | 1959 |
| SMITHTOWN PERFORMING ARTS COUNSELINC | Arts & Culture | $2.3M | $911K | 2008 |
| ST CATHERINE OF SIENA MEDICAL CENTER FOUNDATION | — | $2.3M | $722K | 1946 |
| SMITHTOWN FIRE DEPARTMENT INC | Public Safety | $1.4M | $200K | 1999 |
| ENVIRONMENTAL CENTERS OF SETAUKET SMITHTOWN INC | Environment | $997K | $751K | 1972 |
| GUARDIANS OF RESCUE INC | Animal-Related | $800K | $987K | 2011 |
| STRAUS HISTORICAL SOCIETY INC | Arts & Culture | $530K | $162K | 1999 |
| CURVY GIRLS FOUNDATION INC | Human Services | $494K | $90K | 2014 |
| NOTRE DAME CLUB OF LONG ISLAND INC | Education | $491K | $106K | 1983 |
| ANGEL GUARDIANS FOR THE ELDERLY INC | Human Services | $484K | $75K | 1976 |
| EIGHT COUNTY CHAPTER THREE OF THE AMERICAN ACADEMY OF PEDIATRICS INC | Education | $477K | $111K | 1993 |
| BOOSTER CLUB OF SMITHTOWN | Recreation & Sports | $471K | $359K | 1977 |
| QUINN FAMILY FOUNDATION | Philanthropy | $400K | $40K | 2000 |
| SOCIETY FOR LENDING COMFORTS TO THE SICK OF THE TOWNSHIP OF SMITHTOWN | — | $368K | $94K | 1966 |
| NEW YORK STATE RHEUMATOLOGY SOCIETY INC | Voluntary Health | $346K | $432K | 2005 |
| NEW YORK CITY FIREFIGHTERS HOCKEY CLUB INC | — | $330K | $668K | 1994 |
| KIMBERLY COFFEY FOUNDATION INC | Education | $316K | $9K | 2015 |
| YORKIE911 RESCUE INC | Animal-Related | $314K | $180K | 2011 |
| THE@MARY F SMITH FAMILY FOUNDATION | Philanthropy | $302K | $31K | 2006 |
| LONG ISLAND GREENBELT TRAIL CONFERENCE INC | Environment | $256K | $48K | 2016 |
| AMERICAN ACADEMY OF PEDIATRICS INC | Voluntary Health | $249K | $146K | 1989 |
| NURSE PRACTITIONER ASSOCIATION OF LONG ISLAND INC | — | $237K | $149K | 1992 |
| PTA NEW YORK CONGRESS | — | $173K | $195K | 1954 |
| FRIENDS OF THE RETIRED AND SENIOR VOLUNTEER PROGRAM OF SUFFOLK COUNT | Human Services | $164K | $425K | 1999 |
| HAUPPAUGE EAGLES INC | Recreation & Sports | $150K | $445K | 2022 |
| HOPEFORCLEO INC | Human Services | $94K | $94K | 2022 |
| SMITHTOWN TOWNSHIP EMERGENCY FOOD PANTRY | Food & Agriculture | $78K | $80K | 2011 |
| STROHM FOUNDATION LTD | Voluntary Health | $48K | $108K | 2022 |
| SMITHTOWN TOWNSHIP LACROSSE INC | Recreation & Sports | $47K | $141K | 2015 |
| PTA NEW YORK CONGRESS | — | $43K | $81K | 1985 |
| 4TH PRECINCT FELLOWSHIP INC | Community Improvement | $40K | $70K | 2016 |
| SMITHTOWN FIRE CHIEFS ORGANIZATION INC | Public Safety | $33K | $33K | 2005 |
| ZELDIN CARES INC | Human Services | $29K | $33K | 2023 |
| HAUPPAUGE EAGLES BOOSTER CLUB INC | Recreation & Sports | $27K | $63K | 2010 |
| SUFFOLK COUNTY TENNIS AND EDUCATION FOUNDATION INC | Recreation & Sports | $24K | $51K | 2003 |
| IVY LEAGUE SCHOOL FOUNDATION INC | Education | $24K | $12K | 2009 |
| JONI E GLADOWSKY BREAST CANCER FOUNDATION TR 07252002 | Medical Research | $20K | $3K | 2004 |
| ROCKY POINT LACROSSE BOOSTER CLUB INC | Education | $16K | $85K | 2022 |
| PTA NEW YORK CONGRESS | — | $15K | $145K | 1968 |
| JOSEPH P MCKENNA MARCH FORTH FOUNDATION INC | Human Services | $10K | $61K | 2021 |
| SOULFUL LIVING FOR ADDICTION AND LONG TERM RECOVERY INC | Mental Health | $7K | $83K | 2018 |
| MICHAEL MCDERMOTT MEMORIAL FOUNDATION INC | Education | $6K | $8K | 2020 |
Smithtown, NY has 141 registered 501(c)(3) nonprofit organizations with combined assets of $453.2M. The most common category is Human Services, with 17 organizations. 12 nonprofits have assets exceeding $1 million. That works out to 56.5 nonprofits per 10,000 residents. The oldest active nonprofit dates back to 1946.