Jennifer L. King Partner

Speaks:  English

Year of Call: 2019 - Nunavut

Year of Call: 2007 - Ontario

Primary phone: +1 416-862-5778

Fax: +1 416-862-7661


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Primary office:  Toronto

Jennifer L. King

Jennifer King is a partner in Gowling WLG’s Environmental Law Group with a national practice in environmental law and its intersections with Indigenous, constitutional, municipal, land use planning and regulatory law. Jennifer is an active member of the firm’s Canada North, Indigenous, Advocacy and Municipal Law Groups. She is called to the bar in Ontario and Nunavut.

Jennifer provides strategic regulatory advice and representation on matters including environmental impact assessments, natural resource development, major infrastructure projects and endangered species approvals including in Canada’s near and far north.

She is a tenacious litigator who represents clients before all levels of Ontario courts and the Supreme Court of Canada, and regularly appears before tribunals including the Local Planning Appeals Tribunal. She has a special expertise in constitutional division of powers—foremost in the areas of climate change, municipal law and transportation.

Jennifer finds creative and pragmatic solutions to complex legal and environmental problems for clients including public entities, Indigenous groups and private companies. Some of her current work includes:

  • Advising a group of municipalities on a federal environmental assessment of a proposed major private sector intermodal transportation facility. Jennifer was co-lead counsel on the federal panel review hearing involving multiple experts including transportation, traffic, air quality, health and species at risk
  • Representing an intervener in the provincial references regarding the constitutionality of the federal Greenhouse Gas Pollution Pricing Act. Jennifer appeared before the Ontario and Saskatchewan Courts of Appeal, which both upheld the Act. She is counsel on the provinces’ appeals to the Supreme Court of Canada scheduled to be argued later this year

In 2020, Jennifer was named a Leading Lawyer to Watch in environmental law by Lexpert, and was elected an Executive to the Ontario Bar Association’s Environmental Law Section.

Regularly invited to speak on a wide range of topics, Jennifer is a climate governance expert with the Canada Climate Law Initiative and is on the faculty roster for the Intensive Trial Advocacy Workshop. She recently co-authored the 2018 reissue of Halsbury's Laws of Canada - Environment (LexisNexis Canada), a comprehensive and authoritative guide to Canadian environmental law.

Jennifer acts as chair of Gowling WLG’s Canadian Diversity & Inclusion Council’s Recruitment and Retention Committee and is a member of the Federation of Asian Canadian Lawyers. For over 10 years, she has served on the boards of local neighborhood centres helping to provide a range of community and social services. Jennifer currently sits on the board of the Eastview Neighbourhood Community Centre, a charitable multi-service neighbourhood centre that offers a broad range of recreational, social and capacity-building programs to residents in Toronto's east end.

Career & Recognition

Filter timeline:
  • 2020

  • 2019

    • Qualifications (Year of Call/Admission, etc.)
      Year of Call, Nunavut
  • 2007

    • Qualifications (Year of Call/Admission, etc.)
      Year of Call, Ontario
  • 2006

    • Education
      University of Toronto, JD (Certificate in Environmental Studies)
    • Rankings & Awards
      Legal Aid Ontario Award, University of Toronto
  • 2003

    • Education
      McMaster University, B.A.Sc. (Hons.)
    • Rankings & Awards
      President's Award of Excellence, McMaster University
  • 1998

    • Rankings & Awards
      Loran Award Scholar


  • Canadian Bar Association
  • Ontario Bar Association
  • The Advocates' Society
  • Speaker, “ESG & the Role of the Board”, Women Get on Board, February 24, 2020 (Toronto) & May 26, 2020 (Webinar)
  • "Clean needles in prisons called 'essential health care' in court challenge," CBC News/Canadian Press, March 6, 2020 (Represented the CPHA at the hearing referenced in the article)
  • Panelist, "Adapting to the New Era of Municipal and Planning Law: The Only Constant is Change," Ontario Bar Association's Institute, Feb. 7, 2020
  • Panelist, "The Roller‑Coaster Ride in Municipal Law and Practice," Osgoode Professional Development 14th Annual National Forum: Administrative Law & Practice Program, Oct. 3, 2019
  • Moderator, "Canada's Constitutional Consultation Duty/Indigenous Relations," CNLO 3rd Nuclear Law School, Sept. 19, 2019
  • Keynote speaker and mentor, "Working with Clients and Consultants," OBA Environmental Law Mentorship Program, Sept. 10, 2019
  • Quoted, "Uncertainty for clients due to carbon pricing," Law Times, May 29, 2019
  • Quoted, "Community raises $100,000 to fight proposed quarry in Milton," Hamilton Spector, May 14, 2019
  • Co-author, Halsbury's Laws of Canada - Environment 2018 Reissue (LexisNexis Canada), September 2018
  • Speaker, "Intersection between Workers Safety and Insurance Law and Personal Injury Litigation", with paper entitled "The Right to Sue and Vicarious Liability", The 2015 OBA Workplace Safety and Insurance Law Program, The Ontario Bar Association (Tuesday, May 26, 2015)
  • Speaker, "Information Gathering", with paper entitled "Just the Facts", Workplace Safety and Insurance Law: Practice and Professionalism, The Ontario Bar Association (May 25, 2011)
  • "Counsel Comments - Lloyds Syndicate 1221 (Millennium Syndicate) v. Coventree Inc.", Take Five (Ontario Edition), OnPoint Legal Research (June 2012)
  • "Oil Spills - Responding to Third Party Claims," presentation for Farmers' Mutual Insurance Company (March 3, 2009)

Previous speaking engagements