| 6105 | A VOICE Art Vision & Outreach - 6105, |
| 6132 | Aaniiih Nakoda College - 6132, Harlem |
| 6091 | Abaertern Academy - 6091, Bozeman |
| 0919 | Absarokee Public Schools - 0919, Absarokee |
| 9514 | Action for Eastern MT Head Sta - 9514, Glendive |
| 6049 | Action Inc - 6049, Butte |
| 9070 | Adaskavich SDA School - 9070, Shelby |
| 6269 | ADLC Head Start - 6269, Anaconda |
| 0687 | Alberton K-12 Schools - 0687, Alberton |
| 0653 | Alder-Upper Ruby Elem - 0653, Alder |
| 0277 | Alzada Elementary - 0277, Alzada |
| 6055 | American Baptist Churches - 6055, |
| 0522 | Amsterdam Elementary - 0522, Manhattan |
| 6126 | Anaconda CCC - 6126, Anaconda |
| 6086 | Anaconda PCA Family Resource C - 6086, Anaconda |
| 0401 | Anaconda Public Schools - 0401, Anaconda |
| 0514 | Anderson Elementary - 0514, Bozeman |
| 9071 | Apostle Lutheran - 9071, Billings |
| 0601 | Arlee Public Schools - 0601, Arlee |
| 1047 | Arrowhead Schools - 1047, Livingston |