| Name | Deductibility Code |
| Boys & Girls Club of Lewistown | -- |
| Central Montana Casa Gal | -- |
| Central Montana Childcare Inc. | -- |
| Central Montana Community Cupboard Inc. | -- |
| Central Montana Community Health Center Inc. | -- |
| Central Montana District Six Resources Development Council | -- |
| Central Montana Foundation | -- |
| Central Montana Genealogy Society Inc. | -- |
| Central Montana Head Start Inc. | -- |
| Central Montana Historical Association Inc. | -- |
| Central Montana Medical Facilities Inc. | -- |
| Central Montana Memorial Gardens Inc. | 6 |
| Central Montana Rodeo Club Inc. | -- |
| Central Montana Wildlands Association Inc. | -- |
| Central Montana Youth Mentoring Program Inc. | -- |
| Conservation Congress | -- |
| Educational Opportunities for Central Montana Inc. | -- |
| Fergus County Council on Aging | -- |
| First Christian Church of Lewistown Montana | -- |
| Friends of the Lewistown Public Library | -- |
| Friends of the Missouri Breaks Monument | -- |
| Lewistown Art Center | -- |
| Lewistown Community Development Corporation | -- |
| Lewistown Drag Racers Association | -- |
| Lewistown Kiwanis Memorial Foundation | -- |
| Little Rockies Christian Camping Association | -- |
| Mennen Environmental Foundation Inc. | -- |
| Nami Lewistown | -- |
| Pet Assistance League | -- |
| Saves Inc. | -- |
| Ski for Light Montana Inc. | -- |
| Small Wonder Child Care Inc. | -- |