Oil & gas wells in St. Clair County, IL
1,582 catalogued wells in St. Clair County, Illinois, from the state regulator registry and the federal orphaned-well inventory.
Dataset updated . Derived from public data sources.
At a glance
St. Clair County, Illinois has 1,582 catalogued oil & gas wells: 294 active (19%), 889 plugged & abandoned (56%) and 37 documented orphans. It ranks 25th of the 98 Illinois counties WellCensus profiles by well count and holds 0.9% of the state's 174,478 catalogued wells.
Catalogued wells
1,582
Active
294
Plugged
889
Documented orphans
37
What is the status of oil and gas wells in St. Clair County?
19% of St. Clair County's wells are active, close to the Illinois share of 19%. 56% are plugged & abandoned, against 61% statewide and 47% nationally. 2 wells (0.1%) are shut-in — unplugged but idle. 37 wells (2%) are documented orphans with no operator able to plug them, compared with 2% across Illinois and 4% nationally. The remaining 360 carry status codes outside those classes, such as permitted or cancelled locations.
What kinds of wells are in St. Clair County?
By product class, 261 of the county's wells (16%) are oil wells, 44 (3%) gas wells and 116 (7%) injection wells. Statewide the oil share is 40% and the gas share 1%. The deepest total depth published for a St. Clair County well is 4,085 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 St. Clair County compare with other Illinois counties?
St. Clair County has the 25th-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 25th in Illinois.
Who operates wells in St. Clair County?
418 distinct operators of record are linked to wells in St. Clair County. 98% 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 St. Clair County
🔒 Create a free account to export CSV| Well | API # / state ID | Status | Type | Operator |
|---|---|---|---|---|
| Monken, John 1 | 12-163-00001 | Plugged & abandoned | Other type | Eisenmayer, Etal |
| Louis 2 | 12-163-00008 | Plugged & abandoned | Other type | O'Fallon Oil & Dev. |
| Porter Christy | 12-163-00009 | Plugged & abandoned | Other type | O'Fallon Oil & Dev. |
| Monk's Mound 1 | 12-163-00010 | Plugged & abandoned | Other type | Alco Oil & Gas Corp. |
| 6 | 12-163-00016 | Other status | Other type | Franklin Coal Co |
| Jarvis 1 | 12-163-00022 | Plugged & abandoned | Other type | Kolb Henry |
| Well API 12-163-00025 | 12-163-00025 | Plugged & abandoned | Other type | Colby Mine |
| Well API 12-163-00028 | 12-163-00028 | Other status | Other type | Natural Gas Storage Company of IL |
| Gundlach 1 | 12-163-00030 | Plugged & abandoned | Other type | Mason & Wagner |
| Well API 12-163-00034 | 12-163-00034 | Plugged & abandoned | Other type | Belleville Deep Well Co. |
| Postel 2 | 12-163-00040 | Plugged & abandoned | Other type | Central Refining Co |
| Postel 1 | 12-163-00041 | Plugged & abandoned | Other type | Postel Milling |
| Rayhill 1 | 12-163-00042 | Plugged & abandoned | Other type | Central Refining Co |
| Miller Peter | 12-163-00049 | Plugged & abandoned | Other type | — |
| Grossman 1 | 12-163-00086 | Other status | Other type | — |
| Klingler 1 | 12-163-00087 | Plugged & abandoned | Other type | — |
| Robinson 1 | 12-163-00088 | Plugged & abandoned | Other type | — |
| Daab 1 | 12-163-00089 | Plugged & abandoned | Other type | — |
| Daesch 1 | 12-163-00090 | Plugged & abandoned | Other type | — |
| Keim 1 | 12-163-00091 | Other status | Other type | — |
| Well API 12-163-00092 | 12-163-00092 | Plugged & abandoned | Other type | Smithton Pros & Dev |
| Smith, Harvey 19 | 12-163-00093 | Other status | Other type | Alco Oil & Gas Corp. |
| Smith, Harvey 20 | 12-163-00094 | Other status | Other type | Alco Oil & Gas Corp. |
| Smith, Harvey 21 | 12-163-00095 | Other status | Other type | No Company |
| Roos George 2 | 12-163-00099 | Plugged & abandoned | Other type | Alco Oil & Gas Corp. |
A sample of the county’s wells — every catalogued well has its own page. Browse all 1,582 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 St. Clair County, IL?
St. Clair County, Illinois has 1,582 catalogued oil & gas wells: 294 active, 889 plugged and 37 documented orphans.
How many orphaned wells are in St. Clair County?
37 wells in St. Clair County, Illinois are documented orphans — unplugged with no solvent operator of record, the 25th-highest count among Illinois counties.
What share of wells in St. Clair County are plugged?
889 of St. Clair County's 1,582 catalogued wells (56%) 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); St. Clair County ranks 25th with 1,582.
How many companies operate wells in St. Clair County?
418 distinct operators of record are linked to catalogued wells in St. Clair 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 St. Clair County, Illinois”, https://wellcensus.com/wells/illinois/st-clair (data as of October 10, 2026).