| Name | Deductibility Code |
| Anikwom Wholelife Center Inc. | -- |
| Animal Orphanage | -- |
| Asa C Adams Parent Teacher Organization | -- |
| Biological Conservation Assistance Program | -- |
| Craig Ministries Inc. | -- |
| Down East Emergency Medicine Institute | -- |
| Faith Baptist Church | -- |
| Four Directions Development Corporation | -- |
| Friends of the Orono Public Library | -- |
| General Alumni Association of the University of Maine | -- |
| Housing Foundation | 1 |
| Maine Aquaculture Innovation Center | -- |
| Maine Extension Association | -- |
| Maine Forest & Logging Museum Inc. | -- |
| Maine Mathematics Science and Engineering Talent Search | -- |
| Maine Robotics | -- |
| Maine Rural Partners | -- |
| Maine Sustainable Agriculture Society | -- |
| Max Kagan Family Foundation | 4 |
| New England Educational Opportunity Association | -- |
| Oncology Support Foundation | -- |
| Operation Breaking Stereotypes | -- |
| Orono Economic Development Corporation | 6 |
| Orono Health Association | -- |
| Orono High School Alumni Association | -- |
| Orono Historical Society | -- |
| Orono Land Trust Inc. | -- |
| Orono Public Library Foundation | -- |
| Orono Village Association | -- |
| Orono-Old Town Kiwanis Charities | -- |
| Potato Association of America | -- |
| Research Institute for Mathematics | 4 |
| Second Chance Animal Shelter Inc. | 4 |
| Souillac Group | 4 |
| Stop Hazing Inc. | 4 |
| Treats Falls House Inc. | -- |
| University of Maine | -- |
| University of Maine Foundation | -- |
| University of Maine Pulp and Paper Foundation | -- |
| University of Maine Student Government Inc. | -- |
| Wassookeag School | -- |
| Worcester Institute for Student Exchange | 4 |