John P. O’Neil

John O'Neil

Phone: 440-442-6677

Location: Mayfield Heights, Ohio

Fax: 877-355-1355

Email: Email Me

John P. O’Neil joined Elk & Elk in 2012 as a 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 received his undergraduate degree from Miami University in Oxford, Ohio and his law degree from John Marshall Law School in Chicago, Illinois.

Settlements and Verdicts

$5 million – Loading/unloading accident in Indiana, which caused catastrophic brain injury.

$4.75 million – Truck crash, which caused catastrophic orthopedic injury.

$4.5 million – Case involving a truck striking an elderly pedestrian causing orthopedic and neurological injuries.

$4.25 million – Wrongful death of a 22-month-old baby struck by a passing vehicle while in a stroller.

$3.65 million – Truck accident where a floor mat (product defect) caused unintentional acceleration, causing severe and permanent neurologic injuries.

$2.3 million – Highway crash, causing significant permanent orthopedic and neurologic injury.

$2.0 million – Medical malpractice in Florida of failure to properly diagnose an abscess leading to lower extremity paralysis.

$1.75 million – Wrongful death of a 61-year-old Cleveland man, married with two adult children, killed in an industrial accident in Arizona.

$1.65 million – Personal injury of a 55-year-old male struck while working near another truck in a work zone. Our client suffered a fractured tibia/fibula.

$1.1 million – Intersection collision which resulted in a permanent foot drop.

$1,035,000 million – Shooting range accident which caused serious internal injuries.

$1 million – Wrongful death of a 36-year-old, married with four children, killed in trailer underride crash.

$787,500 result – Bicycle accident case that caused the death of an adult male.

$585,000 – Negligent security case on a college campus.

$540,000 – Wrongful death of a 26-year-old male killed in a one-car crash after leaving strip clubs. Dram shop case.

All lawsuits are different and Elk & Elk makes no representation or promises that it can obtain the same results in other cases. These results do not guarantee, warrant, or predict the outcome of any future legal matter. You should consult an attorney for advice regarding your individual situation.

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, 2019
  • Top 50 Cleveland Super Lawyers – 2013, 2014, 2016, 2017, 2018, 2019
  • Top 100 Ohio Super Lawyers – 2013, 2014, 2016, 2017, 2018, 2019
  • Million Dollar Advocates Forum – Member
  • Multi-Million Dollar Advocates Forum – Member
  • The National Trial Lawyers: Top 100 – 2015
  • America’s Top 100 Attorneys
  • America’s Top 100 High Stakes Litigators®

Professional Associations and Memberships

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