| Name | Deductibility Code |
| Area II Agency on Aging | -- |
| Belfry Senior Citizens Council on Aging | -- |
| Big Horn County Council on Aging | -- |
| Bridger Golden Age Society on Aging | -- |
| Broadview Community Senior Citizens Center Inc. | -- |
| Bull Mountain Volunteer Fire Association | 6 |
| Central Montana Resource Conservation and Development Area | -- |
| Chapel of Hope Ministries of Roundup | -- |
| Columbus Senior Citizens Center | -- |
| Community Emergency Response Team of Musselshell County Inc. | -- |
| Gebhardt Scholarship Foundation | 4 |
| Geyser Raynesford Senior Citizen | -- |
| Golden Valley Senior Citizens Center | -- |
| Joliet Xyzers Council on Aging | -- |
| Judith Basin Senior Citizens Center | -- |
| Judith River Senior Citizens Center | -- |
| Lavina Senior Center | -- |
| Montanas Precious Gold | -- |
| Musselshell County Council on Aging Inc. | -- |
| Musselshell Valley Community Foundation | -- |
| Musselshell Valley Historical Museum Inc. | -- |
| North American Wolf Association | -- |
| Park City Senior Citizens Club | -- |
| Petroleum County Senior Citizens | -- |
| Rapelje Senior Citizens Inc. | -- |
| Roundup Baseball Inc. | -- |
| Roundup Evangelical Bible Church | -- |
| Roundup Memorial Hospital Association | -- |
| Roundup Swim Team Inc. | -- |
| Roundup Volunteer and Musselshell County Rural Fire Dept | -- |
| Shining Mountain Ministries Inc. | -- |
| The Rim Rock Humane Society Inc. | -- |
| Valley Seniors Fromberg Council on Aging | -- |
| Wheatland County Senior Citizens Center | -- |