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Pennsylvania oil and gas wells
224,491 wells on record: 104,831 active, 56,476 plugged, 21,437 flagged orphaned. Source: Pennsylvania Department of Environmental Protection, data as of 2026-10-17.
Top 50 operators by active wells
| Operator | Active | All wells |
|---|
| DIVERSIFIED PROD LLC | 18,032 | 21,609 |
| EXPAND OPER LLC | 2,633 | 2,691 |
| OWS ENERGY LLC | 2,607 | 2,609 |
| VEC ENERGY LLC | 2,340 | 2,351 |
| APOLLO RESOURCES LLC | 1,864 | 1,891 |
| RANGE RESOURCES APPALACHIA LLC | 1,758 | 3,855 |
| CAMERON ENERGY CO | 1,755 | 1,982 |
| PENNHILLS RESOURCES LLC | 1,702 | 1,839 |
| KRIEBEL NATURAL GAS CO LLC | 1,670 | 1,679 |
| MINARD RUN OIL CO | 1,648 | 3,831 |
| BULL RUN RESOURCES LLC | 1,478 | 1,498 |
| SNYDER BROS INC | 1,432 | 2,059 |
| EQT PROD CO | 1,359 | 2,758 |
| PIN OAK ENERGY PARTNERS LLC | 1,254 | 1,274 |
| COTERRA ENERGY INC | 1,197 | 2,013 |
| SENECA RESOURCES CO LLC | 1,176 | 2,579 |
| GREYLOCK CONVENTIONAL LLC | 1,088 | 1,120 |
| OWS ACQUISITION CO LLC | 1,061 | 1,063 |
| FAIRMAN CORP | 911 | 1,047 |
| MTN V OIL & GAS INC | 901 | 994 |
| EASTERN GAS TRANS & STORAGE INC | 887 | 1,424 |
| REPSOL OIL & GAS USA LLC | 849 | 1,459 |
| US ENERGY EXPLORATION CORP | 804 | 1,139 |
| MSL OIL & GAS CORP | 788 | 865 |
| KCS ENERGY INC | 771 | 773 |
| GAS & OIL MGMT ASSN INC | 756 | 940 |
| PA MINERAL SVCS LLC | 701 | 734 |
| DIAMOND ENERGY PARTNERS LLC | 692 | 697 |
| RICE DRILLING B LLC | 691 | 1,097 |
| DANNIC ENERGY CORP | 686 | 822 |
| CNX GAS CO LLC | 670 | 1,599 |
| PENNECO OIL CO INC | 648 | 809 |
| PIERCE & PETERSEN | 612 | 702 |
| FIRST AMER ENERGY INC | 573 | 592 |
| HOWARD DRILLING INC | 526 | 663 |
| PENNENERGY RESOURCES LLC | 526 | 677 |
| ALLSHOUSE TERRENCE L JR | 516 | 556 |
| CAPITAL OIL & GAS INC | 516 | 590 |
| NATL FUEL GAS SUPPLY CORP | 487 | 1,966 |
| PENN VIEW EXPLORATION INC | 485 | 534 |
| ANDERSON ENERGY SVC LLC | 467 | 474 |
| EQT ARO LLC | 454 | 511 |
| KYLANDER OIL INC | 429 | 472 |
| EQT CHAP LLC | 424 | 674 |
| CATALYST ENERGY INC | 419 | 1,482 |
| MCCOOL JOHN E | 417 | 432 |
| R & N RESOURCES LLC | 417 | 438 |
| MEDINA RES DEV CO LLC | 414 | 479 |
| DL RESOURCES INC | 409 | 529 |
| PPP FUTURE DEV INC | 409 | 418 |
Wells by county
- Allegheny 2,899
- Armstrong 11,956
- Beaver 739
- Bedford 95
- Blair 18
- Bradford 4,082
- Bucks 5
- Butler 6,075
- Cambria 974
- Cameron 403
- Carbon 2
- Centre 1,615
- Clarion 6,248
- Clearfield 6,758
- Clinton 1,458
- Columbia 15
- Crawford 5,444
- Dauphin 1
- Elk 6,324
- Erie 4,768
- Fayette 5,000
- Forest 9,244
- Franklin 2
- Fulton 5
- Greene 8,369
- Huntingdon 14
- Indiana 14,615
- Jefferson 8,017
- Juniata 5
- Lackawanna 58
- Lawrence 620
- Luzerne 27
- Lycoming 2,083
- McKean 38,211
- Mercer 4,790
- Mifflin 2
- Monroe 1
- Montgomery 1
- Northumberland 5
- Out Of State 4
- Perry 1
- Pike 4
- Potter 2,815
- Schuylkill 2
- Snyder 3
- Somerset 314
- Sullivan 506
- Susquehanna 3,252
- Tioga 2,550
- Union 2
- Venango 20,155
- Warren 22,775
- Washington 10,662
- Wayne 28
- Westmoreland 9,760
- Wyoming 706
- York 4