| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #1 | Richland County, MT | Aug 2025 | 1.1M BBLs |
| #2 | Roosevelt County, MT | Aug 2025 | 761.5k BBLs |
| #3 | Fallon County, MT | Aug 2025 | 185.9k BBLs |
| #4 | Powder River County, MT | Aug 2025 | 78.5k BBLs |
| #5 | Carbon County, MT | Aug 2025 | 20.7k BBLs |
| #6 | Sheridan County, MT | Aug 2025 | 20.3k BBLs |
| #7 | Wibaux County, MT | Aug 2025 | 19.4k BBLs |
| #8 | Glacier County, MT | Aug 2025 | 17.3k BBLs |
| #9 | Blaine County, MT | Aug 2025 | 15.4k BBLs |
| #10 | Dawson County, MT | Aug 2025 | 10.7k BBLs |
| #11 | Toole County, MT | Aug 2025 | 7.3k BBLs |
| #12 | Valley County, MT | Aug 2025 | 5.5k BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #9 | Glacier County, MT | Aug 2025 | 71.9k MCF |
| #10 | Toole County, MT | Aug 2025 | 59.1k MCF |
| #11 | Valley County, MT | Aug 2025 | 44.1k MCF |
| #12 | Chouteau County, MT | Aug 2025 | 32.3k MCF |
| #13 | Liberty County, MT | Aug 2025 | 23.1k MCF |
| #14 | Sheridan County, MT | Aug 2025 | 9.6k MCF |
| #15 | Dawson County, MT | Aug 2025 | 3.7k MCF |
| #16 | Wibaux County, MT | Aug 2025 | 2.8k MCF |
| #17 | Rosebud County, MT | Aug 2025 | 1.0k MCF |
| #18 | Fergus County, MT | Aug 2025 | 606 MCF |
| #19 | Prairie County, MT | Aug 2025 | 491 MCF |
| #20 | Teton County, MT | Aug 2025 | 155 MCF |