| Name | Deductibility Code |
| Arguild Foundation | 4 |
| Biggs Testamentary Charitable Trust | 4 |
| Borkee-Hagley Foundation Inc. | 4 |
| Brandywine Valley Friends of Old Time Musci Inc. | -- |
| Brokaw Foundation | 4 |
| Cantwells Bridge Foundation | 4 |
| Chipman Coker Foundation | 4 |
| Christ Church Episcopal Preschool Inc. | -- |
| Delaware Animal Rights Association | -- |
| Delaware Aviation Hall of Fame Inc. | -- |
| Delaware Museum of Natural History Inc. | -- |
| Delaware Valley Chorale Inc. | -- |
| Delmarva Ornithological Society | -- |
| Donald and Martha Dewees Foundation | 4 |
| Edgar A Thronson Foundation | 4 |
| Ekedahl Family Foundation Inc. | 4 |
| Ellice and Rosa McDonald Foundation Inc. | 4 |
| Ever Green Plan Inc. | -- |
| Flea Park Foundation | 4 |
| Forgotten Cats Inc. | -- |
| Franke Schoonover Fund Inc. | -- |
| Friends of Brandywine Creek State Park Inc. | -- |
| Friends of Canby Grove Park Inc. | -- |
| Gbl Charitable Foundation | 4 |
| Glencoe Foundation | 4 |
| Mendola Family Fund | 4 |
| Nielsen Family Foundation | 4 |
| Nor Easter Foundation | 4 |
| Reynolds-Rencourt Foundation Inc. | 4 |
| Robin Foundation | 4 |
| Sharp Foundation | 4 |
| Stephen and Janine Marrone Fdn | 4 |
| Struthers Family Foundation | 4 |
| Taylor Smith Foundation | 4 |
| The Graham Foundation | 4 |
| Wilmington Flower Market Inc. | -- |