| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Richland County, MT | Jan 2026 | 1.4M BBLs |
| #2 | Roosevelt County, MT | Jan 2026 | 527.5k BBLs |
| #3 | Powder River County, MT | Jan 2026 | 85.1k BBLs |
| #4 | Sheridan County, MT | Jan 2026 | 19.9k BBLs |
| #5 | Carbon County, MT | Jan 2026 | 18.4k BBLs |
| #6 | Blaine County, MT | Jan 2026 | 18.1k BBLs |
| #7 | Fallon County, MT | Jan 2026 | 17.8k BBLs |
| #8 | Glacier County, MT | Jan 2026 | 16.8k BBLs |
| #9 | Toole County, MT | Jan 2026 | 8.6k BBLs |
| #10 | Valley County, MT | Jan 2026 | 4.2k BBLs |
| #11 | Big Horn County, MT | Jan 2026 | 3.2k BBLs |
| #12 | Rosebud County, MT | Jan 2026 | 2.7k BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Richland County, MT | Jan 2026 | 1.9M MCF |
| #2 | Roosevelt County, MT | Jan 2026 | 775.4k MCF |
| #3 | Phillips County, MT | Jan 2026 | 452.3k MCF |
| #4 | Fallon County, MT | Jan 2026 | 294.7k MCF |
| #5 | Blaine County, MT | Jan 2026 | 174.2k MCF |
| #6 | Hill County, MT | Jan 2026 | 148k MCF |
| #7 | Toole County, MT | Jan 2026 | 94k MCF |
| #8 | Carbon County, MT | Jan 2026 | 92.7k MCF |
| #9 | Glacier County, MT | Jan 2026 | 73.3k MCF |
| #10 | Valley County, MT | Jan 2026 | 39.9k MCF |
| #11 | Chouteau County, MT | Jan 2026 | 33.5k MCF |
| #12 | Liberty County, MT | Jan 2026 | 26.3k MCF |