| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Richland County, MT | Sep 2025 | 1.2M BBLs |
| #2 | Roosevelt County, MT | Sep 2025 | 717.5k BBLs |
| #3 | Fallon County, MT | Sep 2025 | 178.3k BBLs |
| #4 | Powder River County, MT | Sep 2025 | 84.2k BBLs |
| #5 | Carbon County, MT | Sep 2025 | 19.7k BBLs |
| #6 | Wibaux County, MT | Sep 2025 | 18.9k BBLs |
| #7 | Glacier County, MT | Sep 2025 | 16.9k BBLs |
| #8 | Blaine County, MT | Sep 2025 | 14.4k BBLs |
| #9 | Dawson County, MT | Sep 2025 | 11.2k BBLs |
| #10 | Sheridan County, MT | Sep 2025 | 10.1k BBLs |
| #11 | Toole County, MT | Sep 2025 | 7.9k BBLs |
| #12 | Valley County, MT | Sep 2025 | 5.0k BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Powder River County, MT | Sep 2025 | 5.9M MCF |
| #2 | Richland County, MT | Sep 2025 | 1.8M MCF |
| #3 | Roosevelt County, MT | Sep 2025 | 862.5k MCF |
| #4 | Phillips County, MT | Sep 2025 | 461.5k MCF |
| #5 | Fallon County, MT | Sep 2025 | 342.9k MCF |
| #6 | Blaine County, MT | Sep 2025 | 182.4k MCF |
| #7 | Hill County, MT | Sep 2025 | 146k MCF |
| #8 | Carbon County, MT | Sep 2025 | 77.1k MCF |
| #9 | Glacier County, MT | Sep 2025 | 74.9k MCF |
| #10 | Toole County, MT | Sep 2025 | 57.2k MCF |
| #11 | Valley County, MT | Sep 2025 | 42.8k MCF |
| #12 | Chouteau County, MT | Sep 2025 | 31.8k MCF |