| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Richland County, MT | Apr 2026 | 1.4M BBLs |
| #2 | Roosevelt County, MT | Apr 2026 | 564.7k BBLs |
| #3 | Powder River County, MT | Apr 2026 | 73k BBLs |
| #4 | Sheridan County, MT | Apr 2026 | 23.1k BBLs |
| #5 | Carbon County, MT | Apr 2026 | 18.3k BBLs |
| #6 | Blaine County, MT | Apr 2026 | 17.9k BBLs |
| #7 | Fallon County, MT | Apr 2026 | 16.2k BBLs |
| #8 | Glacier County, MT | Apr 2026 | 15.9k BBLs |
| #9 | Toole County, MT | Apr 2026 | 8.2k BBLs |
| #10 | Rosebud County, MT | Apr 2026 | 4.1k BBLs |
| #11 | Valley County, MT | Apr 2026 | 3.8k BBLs |
| #12 | Pondera County, MT | Apr 2026 | 1.7k BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Richland County, MT | Apr 2026 | 1.9M MCF |
| #2 | Roosevelt County, MT | Apr 2026 | 859.2k MCF |
| #3 | Phillips County, MT | Apr 2026 | 440.8k MCF |
| #4 | Fallon County, MT | Apr 2026 | 277.1k MCF |
| #5 | Blaine County, MT | Apr 2026 | 175.2k MCF |
| #6 | Hill County, MT | Apr 2026 | 141.8k MCF |
| #7 | Carbon County, MT | Apr 2026 | 78.3k MCF |
| #8 | Toole County, MT | Apr 2026 | 73.4k MCF |
| #9 | Glacier County, MT | Apr 2026 | 70.4k MCF |
| #10 | Valley County, MT | Apr 2026 | 40.7k MCF |
| #11 | Chouteau County, MT | Apr 2026 | 32.9k MCF |
| #12 | Liberty County, MT | Apr 2026 | 26.5k MCF |