John P. O'Neil

John P. O'Neil

Mayfield Heights, Ohio

John P. O'Neil joined Elk & Elk Co., Ltd. in 2012 as an equity partner. He is one of the firm's leading medical malpractice and personal injury attorneys, whose practice focuses primarily upon death and catastrophic loss cases. Prior to joining Elk & Elk, John spent 14 years at one of Ohio’s top defense law firms, where he served as a practice area chair and member of the firm's management committee and executive group. He also spent time working as a successful prosecutor in the Dade County State Attorney's Office. Over the years, John has successfully tried more than 80 jury trials in various areas of law, including medical malpractice, transportation, legal malpractice, premises liability and others. John's first chair jury trials are in state and federal courts, and he has argued in the Eighth District Court of Appeals, Ohio Supreme Court and Sixth Circuit Court of Appeals.

John practices with the Ohio firm of Elk & Elk Co., Ltd., located in Mayfield Heights. He received his undergraduate degree from Miami University in Oxford, Ohio and his law degree from John Marshall Law School in Chicago, Illinois.

John is married and has four children.

Settlements and Verdicts

  • $5 million settlement of a loading/unloading accident in Indiana, which caused catastrophic brain injury
  • $4.75 million settlement of a truck crash, which caused catastrophic orthopedic injury
  • $4.5 million settlement of a case involving a truck striking a pedestrian causing orthopedic and neurological injuries
  • $3.65 million settlement of a truck accident where a floor mat (product defect) caused unintentional acceleration, causing severe and permanent injuries
  • $2.3 million settlement of a highway crash, causing significant permanent injury
  • $2.0 million medical malpractice settlement in Florida
  • $1.1 million settlement of an intersection collision
  • $1.0 million settlement of a shooting range accident
  • $585,000 settlement of a negligent security case on a college campus

Areas of Practice

  • Personal Injury

Bar Admissions

  • Florida, 1994
  • Ohio, 1997
  • U.S. District Court Northern District of Ohio
  • U.S. District Court Southern District of Ohio


  • John Marshall Law School, Chicago, Illinois
    • J.D. - 1994
  • Miami University, Oxford, Ohio
    • B.S. - 1988

Honors and Awards

  • Ohio Super Lawyers - 2012, 2013, 2014, 2015, 2016, 2017, 2018
  • Ohio Super Lawyers - Top 50 Cleveland Super Lawyers - 2013, 2014, 2016, 2017, 2018
  • Ohio Super Lawyers - Top 100 Ohio Super Lawyers - 2013, 2014, 2016, 2017, 2018
  • Million Dollar Advocates Forum - Member
  • Multi-Million Dollar Advocates Forum - Member
  • The National Trial Lawyers: Top 100 - 2015
  • America's Top 100 Attorneys

Professional Associations and Memberships

  • Federal Bar Association (Northern District of Ohio), Board Member