R
| Rapelje | Ringling |
| Raymond | Ronan |
| Red Lodge | Rosebud |
| Redstone | Roundup |
| Reed Point | Rudyard |
| Richey | Ryegate |
| Montana Historical Society Research Center |
| 225 North Roberts, P.O. Box 201201, Helena, MT 59620-1201, 406-444-2681, 406-444-2696 (fax). |
| mhslibrary@mt.gov |