RANKING ·
Highest net interest margin in Montana
17 of 41 credit unions in Montana that filed for the quarter ended June 30, 2026 are ranked. At least $100 million in total assets. Institutions with equal values share a rank. Source: NCUA Call Report data.
| Rank | Institution | Headquarters | Net interest margin on average assets | Total assets |
|---|---|---|---|---|
| 1 | Sky Federal Credit Union | Livingston, MT | 4.60% | $197 million |
| 2 | Fergus Federal Credit Union | Lewistown, MT | 4.38% | $118 million |
| 3 | Montana Federal Credit Union | Great Falls, MT | 4.06% | $362 million |
| 4 | Altana Federal Credit Union | Billings, MT | 4.03% | $668 million |
| 5 | Intrepid Credit Union | Helena, MT | 3.99% | $311 million |
| 6 | Rocky Mountain Credit Union | Helena, MT | 3.81% | $427 million |
| 7 | Clearwater Federal Credit Union | Missoula, MT | 3.71% | $1.2 billion |
| 8 | Valley Financial Credit Union | Billings, MT | 3.70% | $601 million |
| 9 | Richland Federal Credit Union | Sidney, MT | 3.65% | $119 million |
| 10 | Billings Federal Credit Union | Billings, MT | 3.59% | $216 million |
| 11 | 1st Liberty Federal Credit Union | Great Falls, MT | 3.51% | $214 million |
| 12 | Russell Country Federal Credit Union | Great Falls, MT | 3.45% | $131 million |
| 13 | Park Side Financial Credit Union | Whitefish, MT | 3.43% | $390 million |
| 14 | Lincoln County Credit Union | Libby, MT | 3.31% | $187 million |
| 15 | Grasslands Federal Credit Union | Circle, MT | 3.22% | $141 million |
| 16 | Southwest Montana Community Federal Credit Union | Anaconda, MT | 2.83% | $203 million |
| 17 | Whitefish Credit Union Association | Whitefish, MT | 2.56% | $2.1 billion |
Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings