Ohio Oil
Operator of record for 3,174 catalogued wells across 10 states. Every well below links to its full registry page.
Filed as: OHIO OIL · OHIO OIL CO · OHIO OIL CO · OHIO OIL CO. · …
At a glance
Ohio Oil is the operator of record for 3,174 catalogued U.S. oil & gas wells in 10 states. 783 (25%) are active, 1,681 (53%) plugged & abandoned and 8 flagged as orphaned. Its largest concentration is in Illinois, with 1,733 wells (55% of its portfolio).
Wells operated
3,174
Active
783
Plugged
1,681
Orphaned
8
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 1,733 |
| Kentucky | 735 |
| Michigan | 541 |
| Montana | 116 |
| Colorado | 18 |
| Arkansas | 13 |
| Mississippi | 11 |
| North Dakota | 4 |
| Utah | 2 |
| Alabama | 1 |
Well mix
- Oil wells
- 1,327
- Gas wells
- 22
- Shut-in
- 16
- Active share
- 25%
Is this your company?
Claim Ohio Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Ohio Oil operate?
Ohio Oil's catalogued wells are spread across 10 states: Illinois (1,733), Kentucky (735), Michigan (541), Montana (116) and Colorado (18) and 5 more. Its 1,733 Illinois wells are 1.0% of the 174,478 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of Ohio Oil’s wells are active, plugged or orphaned?
25% of Ohio Oil's catalogued wells are active, 4 percentage points below the national share of 29%. 53% are plugged & abandoned, against 47% nationally. 16 wells (0.5%) are shut-in — unplugged but idle. 8 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Ohio Oil operate?
By product class, 1,327 (42%) are oil wells and 22 (0.7%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Geo W Armstrong 1 1 in Adams, MS at 11,083 ft. The wells listed below sit in Adams (MS), Fallon (MT), Carter (MT), Prairie (MT), Weld (CO) and Rio Blanco (CO) and other counties. State filings spell the name 8 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Ohio Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Geo W Armstrong 1 1 | 23-001-00983 | Plugged & abandoned | Other type | Adams, MS | Ohio Oil Co. | 11,083 ft |
| Ole Roget 1 | 25-025-05088 | Plugged & abandoned | Other type | Fallon, MT | Ohio Oil Company | 10,375 ft |
| Government 2 | 25-011-05083 | Plugged & abandoned | Other type | Carter, MT | Ohio Oil Company | 9,110 ft |
| Govt & Crans<>1 | 25-079-05028 | Plugged & abandoned | Other type | Prairie, MT | Ohio Oil Company | 9,100 ft |
| 1 Mcvicar | 05-123-05753 | Plugged & abandoned | Other type | Weld, CO | Ohio Oil | 9,006 ft |
| Mary Jackson 1-A | 25-011-05081 | Plugged & abandoned | Other type | Carter, MT | Ohio Oil Company | 8,558 ft |
| 1 Nordloh | 05-123-05176 | Plugged & abandoned | Other type | Weld, CO | Ohio Oil | 8,325 ft |
| 1 Ryans Creek Unit | 05-103-05212 | Plugged & abandoned | Other type | Rio Blanco, CO | Ohio Oil | 7,800 ft |
| G L Jacobs 1 | 25-055-05031 | Plugged & abandoned | Other type | Mccone, MT | Ohio Oil Company | 6,965 ft |
| Caldwell 8-A | 25-009-05174 | Plugged & abandoned | Oil | Carbon, MT | Ohio Oil Company | 6,918 ft |
| 1 Leona Butters | 05-087-40031 | Plugged & abandoned | Oil | Morgan, CO | Ohio Oil | 6,764 ft |
| John Rolie 1 | 33-013-00318 | Plugged & abandoned | Oil | Burke, ND | Ohio Oil Co. | 6,716 ft |
Deepest first where depth is published. See all 3,174 wells →
Frequently asked questions
How many wells does Ohio Oil operate?
Ohio Oil is the operator of record for 3,174 catalogued oil & gas wells, with the largest concentration in Illinois (1,733). Only wells in states WellCensus has ingested are counted.
How many of Ohio Oil's wells are still active?
783 of Ohio Oil's catalogued wells are active; 1,681 are plugged & abandoned and 8 are flagged as orphaned.
In which states does Ohio Oil operate wells?
Ohio Oil is the operator of record for wells in Illinois (1,733), Kentucky (735), Michigan (541), Montana (116), Colorado (18), Arkansas (13), Mississippi (11), North Dakota (4), Utah (2) and Alabama (1).
Does Ohio Oil operate mostly oil or gas wells?
1,327 of Ohio Oil's catalogued wells are oil wells and 22 are gas wells; the rest are injection, service or unclassified wells.
What is Ohio Oil's deepest well?
Among wells with a published depth, Geo W Armstrong 1 1 in Adams, MS is the deepest at 11,083 ft.
Where Ohio Oil's wells are
- Oil & gas wells in Illinois· 1,733 operated by Ohio Oil
- Oil & gas wells in Kentucky· 735 operated by Ohio Oil
- Oil & gas wells in Michigan· 541 operated by Ohio Oil
- Oil & gas wells in Montana· 116 operated by Ohio Oil
- Oil & gas wells in Colorado· 18 operated by Ohio Oil
- Oil & gas wells in Arkansas· 13 operated by Ohio Oil
- Largest U.S. well operators
- All well operators
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Ohio Oil — well portfolio”, https://wellcensus.com/operators/ohio-oil-6105 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).