| Ashland | Hays | 
| St. Labre Church, MT-1 | St. Paul Mission and School, MT-19 | 
| St. Labre Indian School, MT-2 | Heart Butte | 
| Billings | St. Anne Church, MT-20 | 
| Billings Catholic Schools, MT-3 | Helena | 
| Box Elder (Rocky Boy) | Cathedral of St. Helena, MT-21 | 
| St. Mary Church, MT-4 | Catholic Church. Diocese of Helena. Archives, MT-22 | 
| Bozeman | Montana Historical Society. Research Library and Photo Archives, MT-23 | 
| Montana State University-Bozeman. Library. Special Collections & Archives, MT-5 | Lame Deer | 
| Montana State University-Bozeman. Museum of the Rockies. Photo Archives, MT-6 | Blessed Sacrament Church, MT-24 | 
| Browning | Lodge Grass | 
| Church of the Little Flower, MT-7 | Our Lady of Loretto Church, MT-25 | 
| De La Salle Blackfeet School, MT-8 | Missoula | 
| Chinook | Christ the King Church, MT-26 | 
| St. Gabriel Church, MT-9 | University of Montana. Maureen and Mike Mansfield Library. K. Ross Toole Archives, MT-27 | 
| Crow Agency | Pablo | 
| Little Bighorn College. Archives, MT-10 | Salish Kootenai College. D’Arcy McNicle Library. Archives, MT-28 | 
| St. Dennis Church, MT-11 | Polson | 
| Cut Bank | Immaculate Conception Church, MT-29 | 
| St. Margaret Church, MT-12 | Poplar | 
| Fort Benton | Our Lady of Lourdes Church, MT-30 | 
| Immaculate Conception Church, MT-13 | Pryor | 
| Glasgow | St. Charles Borromeo Church, MT-31 | 
| St. Raphael Church, MT-14 | Ronan | 
| Great Falls | Sacred Heart Church, MT-32 | 
| Catholic Church. Diocese of Great Falls-Billings. Archives, MT-15 | St. Ignatius | 
| Hamilton | St. Ignatius Mission, MT-33 | 
| Ravalli County Museum. Bitter Root Valley Historical Society, MT-16 | Stevensville | 
| Harlem | Historic St. Mary Church, MT-34 | 
| Fort Belknap Community College. Sitting High Cultural Center, MT-17 | St. Mary Church, MT-35 | 
| Havre | Wolf Point | 
| St. Jude Church, MT-18 | Immaculate Conception Church, MT-36 |