Mercer County, Pennsylvania Wells Summary
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Total wells
Most recent drilling
First on record
Activity status
Mercer County contains 5,059 wells on file, with top operators including DIVERSIFIED PROD LLC and DIAMOND ENERGY PARTNERS LLC.
Most recent well on record: CASTLE BRAND INC 1, operated by WILKES ENERGY INC — last updated March 2026.
Active drilling rigs · Baker Hughes snapshot, week of 2026-07-02
By basin
- 16 Marcellus
- 1 Utica
Drilling for
- 17 Gas
Mercer County well density
Every dot is one well — small blue dots are historic wells;
larger orange dots are wells with activity in the last 60 days.
4,788 wells plotted ·
0 active in last 60 days
Basemap © OpenStreetMap contributors · well data © Oil and Gas Information · tiles served by DynamoMap
Top Operators in Mercer County by total wells
Operators: Diversified Prod Llc, Diamond Energy Partners Llc, Ows Acquisition Co Llc, Atlas Resources Inc, Jmg Energy Llc, Ows Energy Llc, Pa Dep Ofc Oil & Gas Mgmt, Cobra Resources Llc, Allen Energy Llc, Exco Resources Pa Inc.
Top Counties in Pennsylvania most active by total wells
Compare Mercer against the other busiest counties in Pennsylvania:
- McKean · 53,645 wells
- Warren · 34,622 wells
- Venango · 33,925 wells
- Indiana · 16,495 wells
- Armstrong · 12,471 wells
- Forest · 12,317 wells
- Washington · 10,774 wells
- Westmoreland · 10,329 wells
- Jefferson · 9,004 wells
- Greene · 8,447 wells
- Clarion · 7,918 wells
- Clearfield · 7,315 wells
Recent wells
| Well Name | Last activity | Updates | Operator | API |
|---|---|---|---|---|
| CASTLE BRAND INC 1 | 2026-03-18 | WILKES ENERGY INC | 085-24082 | |
| D HORNE (HB-222-104) 1 | 2026-03-18 | WERNER CO | 085-20518 | |
| MATTHEW & JANICE DEJULIA 1 | 2026-03-18 | WILKES ENERGY INC | 085-21744 | |
| TOTH UNIT 1 | 2026-03-18 | WILKES ENERGY INC | 632699 | |
| M BAKER 1 | 2026-03-18 | WERNER CO | 085-20385 | |
| HILLMAR 1 | 2026-03-18 | WILKES ENERGY INC | 085-24097 | |
| J. WANSACK UNIT 1 | 2026-03-18 | WILKES ENERGY INC | 085-21059 | |
| WINNER-HALLIDAY 2 | 2026-03-18 | WINNER JAMES JR | 085-20412 | |
| E FERGUSON 1 | 2026-03-18 | WERNER CO | 085-20436 | |
| FARRELL SLAG LLC 1 | 2026-03-18 | WILKES ENERGY INC | 085-22971 |
Surface Ownership Records:
