| Name | Deductibility Code |
| Alice Shaver Foundation | 4 |
| American Society of Genealogists | -- |
| Angels of Hope Ministry | -- |
| Berkshire Cultural and Educational Initiative Inc. | 3 |
| Berkshire Forum Inc. | -- |
| Broude Trust for the Publication of Musicological Editions | -- |
| Buxton School Inc. | -- |
| Celebrate Wassail Inc. | -- |
| Community Bible Church | -- |
| Community Images Inc. | -- |
| Environmental & Skills Training for Youth Inc. | -- |
| Estate Of Arthur G Rosenburg | 4 |
| Fairbanks Family Charitable Foundation | 4 |
| Friends of the Williamstown Public Library | -- |
| Givenshare Inc. | 4 |
| Greylock ABC Inc. | -- |
| Hoosic River Watershed Association Inc. | -- |
| Institute for International Cooperation and Development Inc. | -- |
| Institute for the Visualization of History Inc. | -- |
| Kauai Foundation for Continuing Education | -- |
| Mount Greylock Parent Teacher Organization Inc. | -- |
| National Committee for History of Art Inc. | 4 |
| New Opera | -- |
| New Phoenix Inc. | -- |
| Patten Family Foundation | 4 |
| Quest for College Inc. | -- |
| Roomful of Teeth Vocal Arts Project Inc. | -- |
| Rotary Club of Williamstown Foundation Inc. | -- |
| Shirley Brownrigg Charitable Tr UW FBO Shirley Brownrigg | 4 |
| Stephen Belouin Youth Sports Fund | -- |
| Sterling & Francine Clark Art Inst | -- |
| Taconic Valley Christian Fellowship | -- |
| The Milton and Dorothy Sarnoff Raymond Foundation | 4 |
| Turner House Living Center for Veterans Inc. | -- |
| Village Ambulance Service Inc. | -- |
| Williams College | -- |
| Williamstown Art Conservation Center Inc. | -- |
| Williamstown Community Association Fund | -- |
| Williamstown Community Chest | -- |
| Williamstown Community Preschool Inc. | -- |
| Williamstown Cooperative Nursery Inc. | -- |
| Williamstown Film Festival Inc. | -- |
| Williamstown House of Local History | -- |
| Williamstown Lacrosse Association Inc. | -- |
| Williamstown Public Library Foundation Inc. | 4 |
| Williamstown Rural Land Foundation Inc. | -- |
| Williamstown Theatre Foundation Inc. | -- |
| Williamstown Youth Center Inc. | -- |
| Willinet Inc. | -- |