Oil & Gas Companies in Montgomery County, KS
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | S & J Operating | | Oil Operator | May 1989 |
| 2 | S & T Oil Compan | | Oil Operator | Feb 1984 |
| 3 | S C Z Oil Compan | | Oil & Gas Operator | Feb 1995 |
| 4 | Sand Bar Oil Com | | Oil Operator | Jun 1986 |
| 5 | Sand Dollar Ener | | Oil Operator | Aug 1984 |
| 6 | Sandefer Larry | | Oil Operator | Aug 1993 |
| 7 | Schuetz, Edna, Ed & Ronald(Deceased) | Coffeyville, KS 67337 | Oil Operator | Nov 2011 |
| 8 | Sek Oil Incorpor | | Oil Operator | Jun 1985 |
| 9 | Serendipity Production Company LC | Guthrie, OK 73044 | Oil & Gas Operator | Apr 2020 |
| 10 | Shearhart, Gary L. | Havana, KS 67347 | Oil Operator | Oct 2001 |
| 11 | Shorts Production LLC | Havana, KS 67347 | Oil Operator | Jun 2025 |
| 12 | Springer, Lee A. | Independence, KS 67301 | Oil Operator | May 2014 |
| 13 | Stack Production | Dewey, OK 74029 | Oil & Gas Operator | Mar 2002 |
| 14 | Steinberger Oil Company | Independence, KS 67301 | Oil & Gas Operator | May 2002 |
| 15 | Stekoll Petroleu | | Oil Operator | Oct 1985 |
| 16 | Sterling Explora | | Oil & Gas Operator | Jun 1994 |
| 17 | Stoeppelwerth DR | | Oil Operator | May 1993 |
| 18 | Stonegate Ranch LLC | Caney, KS 67333 | Oil Operator | Jun 2025 |
| 19 | Stoudt, Jean Marie | Broken Arrow, OK 74011 | Oil Operator | May 2025 |
| 20 | Streamline Energy, LLC | Yates Center, KS 66783 | Oil & Gas Operator | Dec 2019 |
| 21 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 22 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Jun 2025 |
| 23 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
Production numbers shown above are only for Montgomery County, KS and for the production period listed.