| Rank | County | Production Period | Oil Production |
|---|---|---|---|
| #15 | Musselshell County, MT | Sep 2021 | 3.1k BBLs |
| #16 | Pondera County, MT | Sep 2021 | 3.0k BBLs |
| #17 | Teton County, MT | Sep 2021 | 2.6k BBLs |
| #18 | Liberty County, MT | Sep 2021 | 2.3k BBLs |
| #19 | Stillwater County, MT | Sep 2021 | 2.3k BBLs |
| #20 | Prairie County, MT | Sep 2021 | 1.9k BBLs |
| #21 | Petroleum County, MT | Sep 2021 | 1.2k BBLs |
| #22 | Carter County, MT | Sep 2021 | 1.0k BBLs |
| #23 | Yellowstone County, MT | Sep 2021 | 911 BBLs |
| #24 | Daniels County, MT | Sep 2021 | 864 BBLs |
| #25 | Garfield County, MT | Sep 2021 | 630 BBLs |
| #26 | Hill County, MT | Sep 2021 | 16 BBLs |
| Rank | County | Production Period | Gas Production |
|---|---|---|---|
| #1 | Powder River County, MT | Sep 2021 | 5.3M MCF |
| #2 | Richland County, MT | Sep 2021 | 1.2M MCF |
| #3 | Phillips County, MT | Sep 2021 | 567k MCF |
| #4 | Fallon County, MT | Sep 2021 | 460.6k MCF |
| #5 | Roosevelt County, MT | Sep 2021 | 285.7k MCF |
| #6 | Blaine County, MT | Sep 2021 | 234.2k MCF |
| #7 | Hill County, MT | Sep 2021 | 186.3k MCF |
| #8 | Toole County, MT | Sep 2021 | 107k MCF |
| #9 | Carbon County, MT | Sep 2021 | 65k MCF |
| #10 | Glacier County, MT | Sep 2021 | 60.3k MCF |
| #11 | Valley County, MT | Sep 2021 | 55k MCF |
| #12 | Chouteau County, MT | Sep 2021 | 45.2k MCF |