| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Richland County, MT | Dec 2025 | 1.3M BBLs |
| #2 | Roosevelt County, MT | Dec 2025 | 499.5k BBLs |
| #3 | Fallon County, MT | Dec 2025 | 177.5k BBLs |
| #4 | Powder River County, MT | Dec 2025 | 84.8k BBLs |
| #5 | Wibaux County, MT | Dec 2025 | 21.3k BBLs |
| #6 | Carbon County, MT | Dec 2025 | 19.1k BBLs |
| #7 | Sheridan County, MT | Dec 2025 | 18.7k BBLs |
| #8 | Blaine County, MT | Dec 2025 | 17.8k BBLs |
| #9 | Glacier County, MT | Dec 2025 | 16.8k BBLs |
| #10 | Dawson County, MT | Dec 2025 | 10.6k BBLs |
| #11 | Toole County, MT | Dec 2025 | 8.2k BBLs |
| #12 | Valley County, MT | Dec 2025 | 4.8k BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Powder River County, MT | Dec 2025 | 6.1M MCF |
| #2 | Richland County, MT | Dec 2025 | 2.0M MCF |
| #3 | Roosevelt County, MT | Dec 2025 | 720.8k MCF |
| #4 | Phillips County, MT | Dec 2025 | 456.9k MCF |
| #5 | Fallon County, MT | Dec 2025 | 328.1k MCF |
| #6 | Blaine County, MT | Dec 2025 | 175.3k MCF |
| #7 | Hill County, MT | Dec 2025 | 153.3k MCF |
| #8 | Carbon County, MT | Dec 2025 | 78.5k MCF |
| #9 | Toole County, MT | Dec 2025 | 78.1k MCF |
| #10 | Valley County, MT | Dec 2025 | 43.8k MCF |
| #11 | Chouteau County, MT | Dec 2025 | 34.1k MCF |
| #12 | Glacier County, MT | Dec 2025 | 29.7k MCF |