| Name | Deductibility Code |
| Anne Carroll Foundation Inc. | 4 |
| Armenian Health Alliance | -- |
| Arnold Expedition Historical Society | -- |
| Aspera Romanian Educational and Charitable Foundation Inc. | 4 |
| Carroll School Corp | -- |
| Central America Relief Inc. | -- |
| Clark Charitable Trust | 4 |
| Codman Community Farms Inc. | -- |
| Conservation Through Poverty Alleviation International Inc. | -- |
| Daedalus Institute for Biological Research | -- |
| De Cordova and Dana Museum and Park | -- |
| Documentary III | -- |
| Entropy Research Institute Inc. | -- |
| Food Project Inc. | -- |
| Foundation for Chinese Performing Arts Inc. | -- |
| Friends for Tomorrow Inc. | -- |
| Friends of Lincoln Sudanese | -- |
| Friends of Modern Architecture Inc. | -- |
| Friends of Rogers Theater Inc. | 4 |
| Friends of the Lincoln Council on Aging Inc. | -- |
| Friends of the Lincoln Library Inc. | -- |
| Geopartners Foundation Inc. | 3 |
| Gomidas Organ Fund | -- |
| Institute for Leadership Development Inc. | -- |
| Institute for Medical Risk Studies | -- |
| Jacobs Akillian Fam Foundation | 4 |
| James G and Carolyn Birmingham Foundation | 4 |
| James S McDonnell Family Foundation Inc. | 4 |
| K George and Carolann S Najarian Foundation Inc. | 4 |
| Karuna School Inc. | -- |
| Kaya Children International Inc. | -- |
| Lama Yeshe Wisdom Archive | -- |
| Leaves of Grass Fund | 4 |
| Lincoln Extended Activities Program | -- |
| Lincoln Foundation Inc. | -- |
| Lincoln Garden Club | -- |
| Lincoln Minute Men Incorporated | -- |
| Lincoln Nursery School Inc. | -- |
| Lincoln Old Town Hall Corporation | -- |
| Lincoln School Foundation Inc. | -- |
| Lovelane Special Needs Horseback Riding Program Inc. | -- |
| Magic Garden Inc. | -- |
| Malcolm F Macneil Family Fdn II | 4 |
| Mason Faoundation Irrv Tr | 4 |
| Massachusetts Audubon Society Inc. | -- |
| Massachusetts Safety Officers League | -- |
| Medical Development Foundation Inc. | -- |
| Natural Dharma Fellowship | -- |
| New England Environmental Education Alliance Inc. | -- |
| New England Old English Sheepdog Rescue Inc. | -- |
| Nima Foundation | 4 |
| Ocean Alliance Inc. | -- |
| Penobscot Fund | 4 |
| Phyllis G Redstone Foundation | 4 |
| Piecework Partners | 3 |
| Population and Development International Inc. | -- |
| Project Eden Inc. | -- |
| Ramsey McCluskey Family Foundation | 4 |
| Robert E Davoli and Eileen L McDonagh Charitable Foundation | 4 |
| Rural Land Foundation of Lincoln | -- |
| Safeguarding the Historic Hanscom Areas Irreplaceable Resources | -- |
| Social Science Research and Evaluation Inc. | -- |
| Sol Productions Foundation Inc. | -- |
| Stepping Stone Foe All Ministries Inc. | -- |
| Sudanese Education Fund Inc. | -- |
| Sutton 20-21 Foundation Inc. | -- |
| System Dynamics Society Inc. | -- |
| The Gary and Sharon Curhan Family Charitable Foundation Inc. | 4 |
| The Mundt Family Foundation | 4 |
| The Musicamerica Tr | -- |
| The Plato Malozemoff Foundation | 4 |
| The Walden Woods Project | -- |
| To the Water Ltd. | -- |
| Valeo Futbol Club Inc. | -- |
| Webb International Center for Dyslexia Inc. | -- |
| Whetstone Wood Trust Fund | -- |
| William and Jacqueline Shaw Fam Foundation Inc. | 4 |
| William J J Gordon Family Foundation Tr | 4 |