| Name | Deductibility Code |
| Alpha Omega Council Inc. | -- |
| American Association of the Friends of Kosciuszko at West Point Inc. | -- |
| Arthur Ashley Williams Foundation | 4 |
| Bay Path Figure Skating Club Inc. | -- |
| Bay State Reading Institute | -- |
| Capital Scholarship Fund Trust | -- |
| Celebrate Holliston Inc. | -- |
| Charles River Dressage Association Inc. | -- |
| Cures for Ovarian Cancer Inc. | -- |
| Driven to Succeed Inc. | -- |
| Francis N Gaboriault Foundation | 4 |
| Friends of the Holliston Public Library | -- |
| Healy Charitable Foundation Inc. | 4 |
| Helping Hands Foundation Inc. | -- |
| Hnr Foundation Inc. | 4 |
| Hollis Foundation | 4 |
| Holliston Boosters Association | -- |
| Holliston Cable Access Incorporated | -- |
| Holliston Education Foundation Inc. | -- |
| Holliston Elementary Parents Organization | -- |
| Holliston Historical Society | 4 |
| Holliston Mission Possible Inc. | -- |
| Holliston Music Parents Association | -- |
| Holliston Pantry Shelf Inc. | -- |
| Holliston Youth Soccer Association | -- |
| Hollistons Washington Street Players Inc. | -- |
| Interfase | 4 |
| Jfk Scholars | -- |
| Lake Grove Cemetery Association | 6 |
| Massachusetts Respite Coalition Inc. | -- |
| Operation Outreach-Usa Inc. | -- |
| Pet Planet Aid Inc. | 4 |
| Planet Aid Inc. | -- |
| Project Just Because Inc. | -- |
| Senior Support Foundation | -- |
| Sherr Family Foundation | 4 |
| Temple Beth Torah | -- |
| Therapeutic Riding at Breezy Hill Inc. | -- |
| Thrive Inc. | -- |
| Timothy O Connell Foundation | -- |
| Unitarian Universalist Scouters Organization Inc. | -- |
| Waushakum Live Steamers Inc. | -- |