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Patrick O. Dunphy

Co-Founder of Cannon & Dunphy S.C.


Patrick Dunphy, Wisconsin personal injury attorney

Patrick O. Dunphy is a co-founder of Cannon & Dunphy S.C., a firm dedicated to representing persons injured by the negligence of others since 1985. Attorney Dunphy has more than 30 years of trial experience. He has record-setting verdicts and awards ranging from $9,800,000 to $35,300,000.

He is past president of the Wisconsin Academy of Trial Lawyers (now the Wisconsin Association for Justice), a statewide organization of plaintiffs' trial attorneys. He is an invited member of the Inner Circle of Advocates, a national organization of plaintiffs attorneys limited to 100 of the best plaintiffs lawyers in the United States.

He is also an invited member of the International Society of Barristers and the American Board of Trial Advocates. Martindale Hubbell has certified Attorney Dunphy as one of “The Best Lawyers in America”. Attorney Dunphy is certified as a Civil Trial Advocate by the National Board of Trial Advocacy. Attorney Dunphy was recently named by LawDragon as one of the top 50 plaintiffs attorneys and one of the 500 best lawyers in the country for the second year in a row. Attorney Dunphy has been consistently listed as one of the Top 3 Super Lawyers in Wisconsin since 2005. He was recognized by Best Lawyers in America as the Lawyer of the Year, Plaintiffs Personal Injury Litigation in Milwaukee in 2010 and 2012.

In 2009, the Wisconsin Law Journal named Attorney Dunphy one of its “Leaders in the Law”. One of Attorney Dunphy’s cases was featured on 20/20, and the subject of numerous national magazine news articles and an editorial in the New York Times. On April 24, Attorney Dunphy was named the 2014 Marquette University Law School Alumnus of the Year. Recipient of the 2015 Wisconsin Association of Justice President's Award.

Cannon & Dunphy, S.C. featured on cover of Super Lawyers magazine

Professional Memberships:

  • Wisconsin State Bar, 1976
  • U.S. District Court for the Eastern District of Wisconsin
  • U.S. District Court for the Western District of Wisconsin
  • Wisconsin Association for Justice (President, 1994)
  • American Association for Justice
  • International Society of Barristers
  • American Board of Trial Advocates
  • Inner Circle of Advocates
  • Law Committee of the National Center for State Courts


  • Boston College (B.A., magna cum laude, 1973)
  • Marquette University Law School (J.D., 1976)
  • Member, Marquette Law Review, 1975-1976
  • Law Clerk to Chief Judge John Reynolds, U.S. District Court of Wisconsin, 1976-1977

Practice Areas:

Social Involvement:

  • Mr. Dunphy has served as board member, board chair and chair of a capital campaign at Marquette University High School; board member, board chair and co-chair of a capital campaign at Guest House of Milwaukee Homeless Shelter and co-chair of capital campaign for The Hunger Task Force of Milwaukee’s Farm Initiative

Notable Awards and Settlements:

    • $35.3 million verdict for medical malpractice causing severe brain injury to newborn (Walworth County, WI). This is the largest personal injury compensatory damage award in Wisconsin history. The case involved the injection of air into a premature infant during the course of a blood transfusion. The air traveled to the infant's brain, causing permanent damage to the child's walk, speak and carry on activities of daily living.
    • $17.2 million jury verdict in a premises liability case involving severe burn injuries to three masons. This is the first eight-figure personal injury jury verdict in Wisconsin history.*
    • A 2015 verdict on behalf of injured police officers against a licensed gun dealer received national and international attention including interviews on CNN and BBC radio, as well as news coverage in the New York Times, Wall Street Journal, Time Magazine and other national news programs.

    Location: Manitowoc, Manitowoc County, WI

    • $10.46 million judgment in a medical malpractice case for brain damage to a newborn caused by a medical clinic's delay in bringing the newborn in for treatment of acute feeding problems and subsequent dehydration. (co-counsel)

    Location: Port Washington, Ozaukee County, WI

    • $9.8 million award by the State Patients Compensation Panel in a medical malpractice case because of a delay in administrating asthma medication. This is the largest medical malpractice panel award in Wisconsin history. A young woman suffering a severe asthma attack essentially suffocated in the hospital when her primary care physician did not return the urgent calls of the nursing staff to respond to his patient's increasing problems breathing. The woman suffered brain damage from lack of oxygen, became a spastic quadriplegic who could not speak and required health care 24 hours a day 7 days a week for life.

    Location: Green Bay, Brown County, WI

    • $6.3 million settlement for medical malpractice. A young woman developed cervical cancer. Repeated pap smears were misread by local cytotechnologist as normal and pathologists who misread cervical biopsies as normal. As a result, the delay in diagnosis of the woman's cancer caused her to go from curable to incurable. The discovery conducted in the case, led to the successful criminal conviction of the pathology lab that employed the cytotechnologist and pathologist. The case made national news, was reported in the New York Times and was the subject of a story on 20/20.

    Location: Milwaukee, Milwaukee County, WI

    • $5.5 million settlement for defective Jet Ski causing injury to the operator. The Jet Ski had a pressure pulse operated fuel system that had a defective fuel pump diaphragm. The defect resulted in fuel leaking into the body of the Jet Ski while it was in storage. When the client got on the ski and turned on the ignition, the fuel vapors that had built up in the hull and ignited and the ski exploded. The client was thrown off the ski and landed on the adjacent dock, causing injury to his spinal cord and resulting paraplegia.


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