Oil & Gas Companies in Johnson County, WY
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | M & T Incorporated | | Oil & Gas Operator | Oct 1980 |
| 2 | M K M Oil Company | Casper, WY 82602 | Oil & Gas Operator | Jun 1996 |
| 3 | Manx Oil Corporation | Casper, WY 82601 | Oil & Gas Operator | Jun 2010 |
| 4 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 5 | Marlin Oil Company LLC | Gillette, WY 82718 | Oil & Gas Operator | Mar 2023 |
| 6 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Dec 2025 |
| 7 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Dec 2025 |
| 8 | Meadow Deep LLC | | Oil & Gas Operator | Dec 2025 |
| 9 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 10 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 11 | Meritage Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 12 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Dec 2025 |
| 13 | Meyer Douglas P | Longmont, CO 80501 | Oil & Gas Operator | Aug 2006 |
| 14 | Mi3 Energy LLC | | Oil & Gas Operator | Dec 2025 |
| 15 | Michiwest Energy Inc | MT.Pleasant, MI 48858 | Gas Operator | Nov 2000 |
| 16 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 17 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 18 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 19 | Montex Drilling Company LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 20 | MTG Operating Inc | Ridgeland, MS 39158 | Gas Operator | Apr 2011 |
Production numbers shown above are only for Johnson County, WY and for the production period listed.