Attorney Jonathan D. Marx

Attorney Jonathan D. Marx is a founding partner at KaplunMarx, where his primary focus is on personal injury and criminal defense. Attorney Marx has been practicing law for over 30 years, and is the consummate trial lawyer. Jon has represented thousands of clients, in hundreds of court rooms, always focusing his efforts on getting top notch results for clients no matter the circumstances. Jon has been voted a Top 100 Trial Lawyer by the American Society of Legal  Advocates, and achieved a perfect 10.0 rating on legal ranking site – but he is most proud of the great reviews he has received from his clients. These reviews and results speak volumes to his qualities as a trial lawyer. While Jon is based in Bala Cynwyd, PA, he handles cases throughout Pennsylvania and New Jersey.

Areas of Practice

  • Personal Injury Litigation
  • Criminal Defense
  • Commercial Litigation

Bar Admission

  • Pennsylvania
  • New Jersey
  • U.S. District Court, Eastern District of Pennsylvania
  • U.S. District Court for the District of New Jersey


  • Brooklyn Law School, Brooklyn, New York
    • Juris Doctor
  • Penn State University, State College, Pennsylvania
    • Bachelor of Arts
    • Major: Arts and Sciences
    • Beta Sigma Beta – Member

Protect Your Right To Compensation

If you have been injured in any type of accident, you can turn to Pennsylvania personal injury lawyers Ted Kaplun or Jonathan Marx for help obtaining the maximum allowable compensation available to you. We have over 200+ 5-star reviews for a reason. At KaplunMarx, WE DO NOT BACK DOWN.