Oil & Gas Companies in Ohio
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | Unger Well Drilling Corp | Dennison, OH 44621 | Oil & Gas Operator | Dec 1999 |
| 2 | Unicorn Oil & Gas Co Inc | Dorset, OH 44032 | Oil & Gas Operator | Dec 1993 |
| 3 | Union Camp Corp | Dover, OH 44622 | Oil & Gas Operator | Dec 2002 |
| 4 | Union Oil Co | Danville, OH 43014 | Oil & Gas Operator | Dec 2014 |
| 5 | United O&G/Atlee Miller | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1985 |
| 6 | Unity Petroleum | Howard, OH 43028 | Oil & Gas Operator | Dec 2021 |
| 7 | Universal Exploration Inc | Wadsworth, OH 44281-9460 | Oil & Gas Operator | Feb 2012 |
| 8 | Unknown Owner | Columbus, OH 43229 | Oil & Gas Operator | Dec 2008 |
| 9 | Us Energy Oh LLC | Rural Valley, PA 16249 | Oil & Gas Operator | Dec 2024 |
| 10 | Us Oil & Gas Inc | Marietta, OH 45750 | Oil & Gas Operator | Aug 2025 |
| 11 | Utica Resource Operating LLC | Marietta, OH 45750 | Oil & Gas Operator | Sep 2023 |
Production numbers shown above are only for Ohio and for the production period listed.