| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Richland County, MT | Apr 2026 | 1.4M BBLs |
| #2 | Roosevelt County, MT | Apr 2026 | 566.5k BBLs |
| #3 | Powder River County, MT | Apr 2026 | 73k BBLs |
| #4 | Sheridan County, MT | Apr 2026 | 27.5k BBLs |
| #5 | Blaine County, MT | Apr 2026 | 19.9k BBLs |
| #6 | Carbon County, MT | Apr 2026 | 18.3k BBLs |
| #7 | Glacier County, MT | Apr 2026 | 16.4k BBLs |
| #8 | Fallon County, MT | Apr 2026 | 16.4k BBLs |
| #9 | Toole County, MT | Apr 2026 | 10.7k BBLs |
| #10 | Rosebud County, MT | Apr 2026 | 4.1k BBLs |
| #11 | Valley County, MT | Apr 2026 | 3.8k BBLs |
| #12 | Big Horn County, MT | Apr 2026 | 3.0k BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Richland County, MT | Apr 2026 | 1.9M MCF |
| #2 | Roosevelt County, MT | Apr 2026 | 859.8k MCF |
| #3 | Phillips County, MT | Apr 2026 | 444.1k MCF |
| #4 | Fallon County, MT | Apr 2026 | 279.9k MCF |
| #5 | Blaine County, MT | Apr 2026 | 185.2k MCF |
| #6 | Hill County, MT | Apr 2026 | 156.2k MCF |
| #7 | Toole County, MT | Apr 2026 | 105.2k MCF |
| #8 | Carbon County, MT | Apr 2026 | 78.3k MCF |
| #9 | Glacier County, MT | Apr 2026 | 70.5k MCF |
| #10 | Valley County, MT | Apr 2026 | 42.2k MCF |
| #11 | Chouteau County, MT | Apr 2026 | 32.9k MCF |
| #12 | Liberty County, MT | Apr 2026 | 32.7k MCF |