Patrick J. Thornton practices primarily in the areas of construction and environmental law, medical malpractice, and commercial litigation. He prosecutes and defends matters involving insurance coverage disputes, mechanic's liens, eminent domain and condemnation, breaches of contract, and numerous tort theories. Patrick represents clients of many sizes, including individuals, small businesses, limited partnerships, homeowners associations, municipalities, and large private companies. A member of the Missouri and Illinois Bars, Patrick has litigated cases in the federal and state courts of both states as well as the Eighth Circuit Court of Appeals.

Patrick was selected for inclusion in Missouri & Kansas Rising Stars® in 2015-2021.

Practice Areas


  • Washington University in St. Louis School of Law (J.D., cum laude, 2010)
    • Washington University Journal of Law & Policy, board member
    • Honor Scholar Award (2008-2009, 2009-2010)
    • Academic Excellence Award
  • University of Notre Dame (B.A., cum laude, 2006)
    • Political Science

Legal Background

  • Judicial intern, Hon. Rodney W. Sippel, U.S. District Court, Eastern District of Missouri (Spring 2010)
  • Summer associate, Lewis Rice LLC (2009)
  • Summer intern, U.S. Attorney's Office, Eastern District of Missouri (2008)
  • Intern, St. Louis County Public Defender's Office (Winter 2006-2007)

Professional Affiliations

  • American Bar Association
  • Bar Association of Metropolitan St. Louis


  • Missouri Bar
  • Illinois Bar
  • U.S. District Courts, Western and Eastern District of Missouri, Southern District of Illinois

Charitable & Civic Activities

  • Secretary, Notre Dame Club of St. Louis (2012-present)
  • Alumni Board member, Saint Louis Priory School (2012-present)
  • Committee member, Young Friends of the St. Louis Arc (2012-present)
  • Volunteer, Next Chapter Book Club, St. Louis Arc (2007-2009; 2011-present)


  • Missouri Bar Leadership Academy, Class of 2014-2015