| Name | Deductibility Code |
| Angels Hope | -- |
| Anglican Church of the Resurrection | -- |
| Animals Lovers for Infinity Inc. | 3 |
| Cape Cod Genealogical Society Inc. | -- |
| Cape Cod Tech Superteams Inc. | 4 |
| Cape Community Orchestra | -- |
| Cape Verdean Multicultural Auxiliary Inc. | -- |
| East Harwich Community Association | -- |
| Family Pantry Corp | -- |
| Friends of Brooks Free Library Inc. | 4 |
| Friends of the Harwich Council on Aging Inc. | -- |
| Friends of the Harwich Cultural Exchange Centers Inc. | -- |
| Friends of the Harwich Early Childhood Advisory Council Inc. | -- |
| Friends of the Harwich Youth Center | -- |
| Friends of the South Harwich Meetinghouse Inc. | -- |
| General Breed Fund | -- |
| Guild of Harwich Artists Inc. | -- |
| Harwich Baseball Inc. | -- |
| Harwich High School Friends of the Arts Inc. | -- |
| Harwich Historical Society | -- |
| Harwich Police Association Inc. | -- |
| Kelley All Stars Inc. | -- |
| Mid Cape Church Homes Inc. | -- |
| Pine Oaks III Inc. | -- |
| Rachel House Inc. | -- |
| Rockne Association Inc. | -- |
| Sand Pond Foundation | 4 |