Every active oil and gas formation and play in Ohio — Utica, Point Pleasant, Marcellus, Clinton, Mississippi Lime, Cherokee Platform, Hunton, Granite Wash, and more — ranked by well count, with the top operators and primary counties for each.
Refreshed monthly from ODNR well records. Data current as of 2026-07-13.
Top Operators:
Ows Acquisition CO LLC (5,608), Diversified Production LLC (4,688), Eco Power Crypto LLC (2,262), Northwood Energy (1,462), Oxford Oil (1,430), Kenoil (1,353), Petrox (1,207), Pin Oak Energy Partners (1,158), Stonebridge Operating Company (1,070), Cgas Exploration (1,021)
Primary counties: Washington, Monroe, Muskingum, Licking, Coshocton
Top Operators:
Huffmanbowers (371), Kilbarger Investments (365), Quaker State Oil Ref (325), Oxford Oil (272), Kenoil (271), 4m Enterprise (214), Northwood Energy (160), J D Drilling Company (155), R C Poling (154), Bell Oil (139)
Primary counties: Hocking, Perry, Fairfield, Vinton, Ashland
Top Operators:
Landowner Grant Program 2005 (102), Frantz Enterprises (83), Nieset Lawrence & Christ (75), J & J Operating (55), A S Energy (49), Rockwell Oil Company (48), Bakerwell Serv Rigs (42), Belden And Blake CORP Dba Ward Lake Energy (41), Second Oil (39), Harmeyer Richard G (39)
Primary counties: Hancock, Allen, Auglaize, Wood, Seneca
Top Operators:
Ascent Resourcesmarcellus (266), Eog Ohio, LLC (244), Gulfport Appalachia (136), Eog Resources (96), Hilcorp Energy Company (82), Expand Operating LLC (41), Rice Drilling B (32), Inr Ohio LLC (23), Diversified Production LLC (11), Southwestern Energy Production Company (11)
Primary counties: Monroe, Belmont, Harrison, Columbiana, Washington
Top Operators:
Ascent Resourcesmarcellus (81), Eog Ohio, LLC (67), Inr Ohio LLC (49), Eog Resources (45), Houghton Investments (20), Antero Resources (18), Hocking Hills Energy And Well Service LLC (17), Chuck Henry Energy (17), Ohio Energy Assets (16), Chesapeake Energy (14)
Primary counties: Morgan, Noble, Guernsey, Pickaway, Medina
Top Operators:
Franklin Gas & Oil (47), Orphan Well Program (29), Maj (19), Range Resources (16), River Valley Energy (14), Shafer David Oil Production (11), Eco Power Crypto LLC (11), R C Poling (11), Red Bird Producing Company (10), Oxford Oil (10)
Primary counties: Richland, Scioto, Huron, Pike, Crawford
Top Operators:
Grahammichaelis (74), Pioneer Drilling Company (56), Northern Indiana Producer (26), Oge Energy (12), Belden And Blake CORP Dba Ward Lake Energy (10), Fitzgerald Energy Produc (8), Dusty Drilling (6), Fulton Energy (5), Frantz Enterprises (5), Aurora Energy (4)
Primary counties: Henry, Lucas, Paulding, Defiance, Fulton
Top Operators:
J D Drilling Company (93), Gulfport Appalachia (21), Appalachian Exploration (14), Equity Oil & Gas Funds In (13), Ascent Resourcesmarcellus (4), Amtek Oil (4), Jadoil INC D Vernau (3), Gulfport Energy (3), Murphy Oil Company (3), Wood & Locker (3)
Primary counties: Jefferson, Meigs, Belmont
Top Operators:
Maj (20), Energy Resource Technology Gom (18), Cemco Operating (14), Tristar Petroleum Resourc (11), Coshocton Pipe Company (8), Manitou Explor (7), Cgas Exploration (6), Northeast Natural Energy (5), Burlington Resources Oil & Gas Company (5), Petro Evaluation Serv (5)
Primary counties: Scioto, Jackson, Morrow, Richland, Pike
Top Operators:
Fulton Energy (22), Don Yohe Enterprises (11), Frantz Enterprises (7), Total Petroleum (6), Aurora Energy (4), Savoy Energy (4), Haupricht Gene F (4), Quicksilver Resources (3), Trendwell Energy (3), Columbia Gas Transmission (2)
Primary counties: Fulton, Williams
Source: Ohio Department of Natural Resources well-header records, aggregated by primary play / interpreted formation / basin.
Threshold: Only formations with at least 50 wells are listed (excludes one-off wildcat plays).
Why it matters: Knowing which formation underlies your tract — and which operators are actively drilling that formation — is the foundation of mineral-rights valuation. Stacked plays (Utica/Point Pleasant Marcellus + Mississippian) carry materially different upside than single-bench mature plays.
Refresh cadence: Monthly. Data current as of 2026-07-13.
The geology under your tract drives your valuation. Get a free written offer based on your specific formation and county.
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State: Ohio
Active formations: 10
Total wells: 120,418
Recent permits: 1,046
Last refresh: 2026-07-13
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