| Name | Deductibility Code |
| Big Horn Arts & Crafts Association | -- |
| Big Horn Christian Academy Inc. | -- |
| Big Horn County Association of Senior Citizens Inc. | -- |
| Big Horn County Crime Prevention Council Inc. | -- |
| Big Horn County Geneological Society | -- |
| Big Horn County Historical Society | -- |
| Big Horn County Memorial Hospital and Health Care Foundation | -- |
| Big Horn County Memorial Hospital Auxiliary | 4 |
| Big Horn Hospice Inc. | -- |
| Big Horn Hospital Association | -- |
| C I T E Inc. | 5 |
| Custer Battlefield Historical and Museum Association Inc. | -- |
| Friends of the Depot | -- |
| H E P Club | -- |
| Hardin Graduation Celebration Association | -- |
| Helping Hands in Hardin Inc. | -- |
| Heritage Acres Auxiliary Limited | -- |
| Historical Museum of Big Horn County | -- |
| Northwestern National Military Museum & Foundation Inc. | -- |
| Ping Golden Age Trust Foundation | 4 |
| Street Outreach Shelter Inc. | -- |