W. Jason Hartwig

252 NW 70th Street
Oklahoma City, OK 73116

Phone:  (405) 262-4040
Direct:  (405) 605-4985
Fax:  (405) 262-4058

W. Jason Hartwig leads the Bass Law civil litigation practice group. Jason’s civil litigation practice focuses on ad valorem tax, business, commercial, environmental, municipal, oil and gas, real property and water disputes and litigation in state and federal courts and administrative proceedings.

Jason represents farmers, ranchers, landowners and royalty owners concerning a variety of oil and gas, water and wind related disputes and litigation, environmental and pollution disputes and litigation, lease negotiation, and the litigation of real property and title disputes.

Jason’s practice includes the representation of clients in disputes involving the valuation and ad valorem taxation of manufacturing facilities and plants, oil and gas gathering systems, exploration and production equipment, processing plants, renewable energy facilities, natural gas and crude oil in storage and combined cycle electric generating plants.

Jason’s practice also includes the representation of local governments in contract and commercial disputes, oil and gas law disputes, real property and zoning disputes, union-related disputes and general litigation matters. Jason is also active in providing legal counsel to local governments for the preparation of ordinances, resolutions, processes and procedures to ensure compliance with state and federal laws.


  • Bachelor of Arts (Political Science), University of Oklahoma, 2006
  • Juris Doctor, Summa Cum Laude, Oklahoma City University School of Law, 2009


  • All Oklahoma Trial and Appellate Courts, 2009
  • United States District Court for the Western District of Oklahoma
  • United States District Court for the Northern District of Oklahoma
  • United States Bankruptcy Court for the Western District of Oklahoma
  • United States Court of Appeals for the Tenth Circuit


  • American Bar Association
  • Oklahoma Bar Association
  • Energy and Natural Resources Law Section, Vice Chair, 2023
  • Energy and Natural Resources Law Section, Secretary, 2022
  • Oklahoma Bar Journal, Board of Editors, 2021, 2022, 2023
  • Oklahoma County Bar Association
  • Canadian County Bar Association
  • Oklahoma Bar Foundation

Articles & Presentations

  • Speaker, The Eugene Kuntz Conference on Natural Resources Law and Policy, 2020
  • Speaker, Oklahoma Oil and Gas, Mineral and Land Conference, Southwestern Oklahoma State University, 2018
  • Don’t Forget About Us: Considerations for Nonoperating Interest Owners During Down Economic Periods in Oklahoma’s Oil and Gas Industry, 88 Okla. Bar. J. 277 (Feb. 11, 2017)

Honors & Awards

  • CALI Awards; Agency/Unincorporated Business Associations, Criminal Procedure I, Consumer Bankruptcy, Corporations, Law of Alternative Dispute Resolution, Legal Research & Writing II, and Mergers & Acquisitions
  • Undergraduate Research Fellow, Carl Albert Congressional Research and Studies Center, University of Oklahoma
  • President’s Leadership Class, University of Oklahoma
  • Oklahoma Bar Association, Business and Commercial Law Section, Corporate Law Award
  • American Bankruptcy Institute Medal of Excellence

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