Oil & Gas Companies in Parker County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 2 | Geostrat Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2011 |
| 3 | Giant Energy Corp. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2019 |
| 4 | Giant NRG Co., LP | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 5 | Glen D. Gonzenbach, LLC | Henrietta, TX 76365 | Oil & Gas Operator | Dec 2016 |
| 6 | Global Drilling, LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 7 | Go Oil Corp. | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 8 | Gonzenbach Oil & Gas, LLC | Henrietta, TX 76365 | Oil & Gas Operator | May 2020 |
| 9 | Gonzenbach, Glen D | Henrietta, TX 76365 | Oil & Gas Operator | Aug 2007 |
| 10 | Gould Energy Co. | Owasso, OK 74055 | Oil & Gas Operator | Mar 2005 |
| 11 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Dec 2020 |
| 12 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 13 | Graystone Exploration Corp. | Garland, TX 75043 | Oil & Gas Operator | Aug 2003 |
| 14 | Great West Operating Co., Inc. | Dallas, TX 75240 | Oil & Gas Operator | Aug 2003 |
| 15 | Green River Resources Inc. | Keystone, CO 80435 | Oil & Gas Operator | Oct 2025 |
| 16 | Grey Rider Energy, LLC | Schertz, TX 78154 | Oil & Gas Operator | Oct 2025 |
| 17 | Grissom, Charles A. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2001 |
| 18 | Grynberg, Jack J. | Denver, CO 80237 | Oil & Gas Operator | Jun 2021 |
| 19 | Gulftex Operating Inc | Plano, TX 75093 | Oil & Gas Operator | Oct 2025 |
| 20 | Gupton Gas Co. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 1994 |
| 21 | Gypsy Oil Co. | Austin, TX 78720 | Oil & Gas Operator | Jul 2017 |
Production numbers shown above are only for Parker County, TX and for the production period listed.