Oil & gas wells in Mason County, IL
78 catalogued wells in Mason County, Illinois, from the state regulator registry and the federal orphaned-well inventory.
Dataset updated . Derived from public data sources.
At a glance
Mason County, Illinois has 78 catalogued oil & gas wells: 0 active (0%), 53 plugged & abandoned (68%) and 1 documented orphans. It ranks 87th of the 98 Illinois counties WellCensus profiles by well count and holds 0.0% of the state's 174,478 catalogued wells.
Catalogued wells
78
Active
0
Plugged
53
Documented orphans
1
What is the status of oil and gas wells in Mason County?
0% of Mason County's wells are active, 19 percentage points below the Illinois share of 19%. 68% are plugged & abandoned, against 61% statewide and 47% nationally. 1 wells (1%) are documented orphans with no operator able to plug them, compared with 2% across Illinois and 4% nationally. The remaining 24 carry status codes outside those classes, such as permitted or cancelled locations.
What kinds of wells are in Mason County?
By product class, 0 of the county's wells (0%) are oil wells, 0 (0%) gas wells and 0 (0%) injection wells. Statewide the oil share is 40% and the gas share 1%. The deepest total depth published for a Mason County well is 1,685 ft, against 29,864 ft for Illinois as a whole. 100% of the county's wells carry coordinates and appear on the map.
How does Mason County compare with other Illinois counties?
Mason County has the 87th-most catalogued wells of the 98 Illinois counties with at least 25. The median Illinois county on WellCensus has 525 wells. The largest, Crawford County, has 22,961. By documented orphans it ranks 55th in Illinois.
Who operates wells in Mason County?
23 distinct operators of record are linked to wells in Mason County. 100% of the county's wells carry a link to a canonical operator profile; the rest list no operator or a name not yet resolved. Each well's page names its operator where the state publishes one.
Wells in Mason County
🔒 Create a free account to export CSV| Well | API # / state ID | Status | Type | Operator |
|---|---|---|---|---|
| Coal Boring | 12-125-00001 | Other status | Other type | Alco Oil & Gas Corp. |
| Woodrow 1 | 12-125-00004 | Plugged & abandoned | Other type | Engelke F W & M |
| Mohlman 1 | 12-125-00005 | Plugged & abandoned | Other type | Engelke, F. W. |
| Friend 1 | 12-125-00006 | Plugged & abandoned | Other type | Niagara Oil Co. |
| Kramer, W. 1 | 12-125-00017 | Plugged & abandoned | Other type | Pinkston, Jacob L. |
| Hayes 1 | 12-125-00033 | Plugged & abandoned | Other type | Stewardson, Merle D. |
| Bradley 1 | 12-125-00034 | Plugged & abandoned | Other type | Fenstermaker, Paul |
| Swaar 1 | 12-125-00035 | Plugged & abandoned | Other type | Stewardson, Merle D. |
| Lascelles 1 | 12-125-00037 | Plugged & abandoned | Other type | Hagen, Lowell & Leon |
| Friend, C. 1 | 12-125-00038 | Plugged & abandoned | Other type | Hagen, Lowell & Leon |
| Hoff 1 | 12-125-00040 | Plugged & abandoned | Other type | Hagen, Kenneth L. |
| Ermeling, H. J. 1 | 12-125-00041 | Plugged & abandoned | Other type | Hagen, Kenneth L. |
| White, Howard 1 | 12-125-00049 | Plugged & abandoned | Other type | Hagen, Kenneth L. |
| Foste, Elizabeth 1 | 12-125-00050 | Plugged & abandoned | Other type | McElyea, Paul W. |
| Harfst, Loren 1 | 12-125-00051 | Plugged & abandoned | Other type | McElyea, Paul W. |
| Blessman, G. 1 | 12-125-00062 | Plugged & abandoned | Other type | Pinkston Jacob L |
| Ainsworth 1 | 12-125-00063 | Plugged & abandoned | Other type | Pinkston Jacob L |
| Wilson, C. R. 1 | 12-125-00095 | Plugged & abandoned | Other type | Unknown |
| Null, J R 1 | 12-125-00138 | Plugged & abandoned | Other type | Unknown |
| Cashin Ed 1 | 12-125-00178 | Plugged & abandoned | Other type | Werner Bros |
| Ingersoll 1 | 12-125-00236 | Plugged & abandoned | Other type | Panhandle Eastern Pipe Line Company |
| Ingersoll 2 | 12-125-00237 | Plugged & abandoned | Other type | Panhandle Eastern Pipe Line Company |
| Leinweber 1 | 12-125-00238 | Plugged & abandoned | Other type | Panhandle Eastern Pipe Line Company |
| Whitaker 1 | 12-125-00239 | Plugged & abandoned | Other type | Panhandle Eastern Pipe Line Company |
| Gathmann 1 | 12-125-00240 | Plugged & abandoned | Other type | Panhandle Eastern Pipe Line Company |
A sample of the county’s wells — every catalogued well has its own page. Browse all 78 in search → (filter by operator, status and type, then export), or find a specific well on the live map.
Frequently asked questions
How many oil and gas wells are in Mason County, IL?
Mason County, Illinois has 78 catalogued oil & gas wells: 0 active, 53 plugged and 1 documented orphans.
How many orphaned wells are in Mason County?
1 wells in Mason County, Illinois are documented orphans — unplugged with no solvent operator of record, the 55th-highest count among Illinois counties.
What share of wells in Mason County are plugged?
53 of Mason County's 78 catalogued wells (68%) are plugged & abandoned, compared with 61% across Illinois.
Which Illinois county has the most oil and gas wells?
Crawford County has the most catalogued wells of any Illinois county on WellCensus (22,961); Mason County ranks 87th with 78.
How many companies operate wells in Mason County?
23 distinct operators of record are linked to catalogued wells in Mason County, Illinois.
Nearby in the Illinois rankings
About this data
Source: Illinois State Geological Survey well registry, plus the USGS United States Documented Orphaned Well Database (2026, doi 10.5066/P13FHBYG), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Oil & gas wells in Mason County, Illinois”, https://wellcensus.com/wells/illinois/mason (data as of October 10, 2026).