| Name | Deductibility Code |
| Ahrens Park Foundation | 3 |
| Birthright of Grinnell Inc. | -- |
| Blue and White Athletic Booster Club | -- |
| Brooklyn Historical Society Inc. | -- |
| Central Iowa Christian School | -- |
| Church of Christ | -- |
| Claude W Ahrens Charitable Trust | 4 |
| Claude W and Dolly Ahrens Foundation Corporation | 4 |
| Galaxy Inc. | -- |
| Greater Poweshiek Community Foundation | -- |
| Grinnell Area Arts Council | -- |
| Grinnell Day Care Center Inc. | -- |
| Grinnell General Hospital Auxiliary | -- |
| Grinnell Historical Museum Society | -- |
| Grinnell Mutual Group Foundation | 4 |
| Grinnell Productions | -- |
| Grinnell Regional Medical Center | -- |
| Grinnell Regional Medical Center Foundation | -- |
| Grinnell Sister City Association Inc. | -- |
| Grinnell Youth Baseball Softball Association | -- |
| Grinnell-Newburg Boosters | -- |
| Imagine Grinnell A Quality of Life Foundation | -- |
| Iowa Research & Education Network | -- |
| Iowa State Sheriffs & Deputies Assoc Institute Inc. | -- |
| Iowa Transportation Museum | -- |
| Jeff Yalden Homes | -- |
| Jewel Box Quilters Guild | -- |
| Main Street Grinnell Inc. | -- |
| Mayflower Health and Human Services Corporation | -- |
| Mayflower Homes Foundation | -- |
| Mayflower Homes Inc. | -- |
| Michael and Susan Witt Foundation | 4 |
| Mt. Pleasant Primitive Baptist Church | -- |
| Myrtle Cass Tr | 4 |
| National Federation of the Blind Service Foundation Inc. | -- |
| Poweshiek Animal League Shelter & Human Society | -- |
| Poweshiek Area Housing Inc. | -- |
| Poweshiek County Council on Aging Inc. | -- |
| Poweshiek County Fair Foundation | -- |
| Poweshiek County Mental Health Center | -- |
| Prairie View Preschool & Childcare | -- |
| Rock Creek Lake Alliance | -- |
| Salt International | -- |
| Second Mile Inc. | -- |
| Social Entrepreneurs of Grinnell | -- |
| St. Francis Manor Foundation | -- |
| St. Francis Manor Inc. | -- |
| Stage Right Productions Inc. | -- |
| Sully Health Foundation Inc. | -- |
| Swestka Family Foundation | 4 |
| Tallgrass Prairie Audubon Society | -- |
| Trustees of Grinnell College | -- |
| Uncle Sams Inc. | -- |
| United Fund of Grinnell Iowa Inc. | -- |