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San Mateo County, CA oil and gas wells

245 wells: 2 active, 188 plugged, run by 85 operators.

Figures from the California Geologic Energy Management Division (CalGEM), updated 2026-10-19.

Top operators in San Mateo

OperatorActiveWells here
John Tedesco23
Neaves Petro. Developments040
Costa Loma Ltd.022
Union Oil Company of California018
Chevron U.S.A. Inc.011
The Eric and Susan Dunn Living Trust dated July 27, 2006011
Botto And Miller, Trustees07
Peninsula Open Space Trust07
John M. Young05
Zia-Verde05
Arco Western Energy Co.04
Brayton-La Honda, Ltd.04
Cann & Wallis04
E. T. Willard04
J. Berger04
KPR Corp.04
Exxon Mobil Corporation03
Fountain Oil Co.03
M. J. & O.03
Mobil Oil Exploration & Production North America, Inc.03
The 2020 Macmillan and Peterson Family Revocable Trust03
W. A. Sage03
Wilshire Oil Company, Inc.03
C. C. Julian and Co.02
Deuel Petroleum Company, Inc.02

Wells

Not plugged · All wells · Plugged · Orphaned

WellAPI / IDStatusTypeOperator
Lease by Calmateo Petro. Corp. 1 04-081-00102Shut in Dry holeCalmateo Petro. Corp.
Lease by Elk Hills Pool Oil Co. 1 04-081-00118Shut in Oil & gasElk Hills Pool Oil Co.
Lease by H. H. McClintock Co. 1 04-081-00098Shut in Dry holeH. H. McClintock Co.
Lease by John Tedesco 2 04-081-00016Active Oil & gasJohn Tedesco
Lease by John Tedesco 4 04-081-00180Active Oil & gasJohn Tedesco
Lease by Midstate Oil Co. 1 04-081-00109Shut in Dry holeMidstate Oil Co.
Lease by Poso-Moon Oil Co. 1 04-081-00096Shut in Dry holePoso-Moon Oil Co.
Lease by Redwood Petro. Co. 1 04-081-00075Shut in Dry holeRedwood Petro. Co.
Lease by Skyline Oil & Refining Corp. 1 04-081-00018Shut in Dry holeSkyline Oil & Refining Corp.
Lease by Unity Oil Co. 1 04-081-00137Shut in Dry holeUnity Oil Co.
Lease by Unknown Operator 1 04-081-00183Shut in Dry hole—
Yates-Thunderbolt 1 04-081-00169Shut in Dry holeMaurice Yates