Free Case Consultation : (215) 309-4982
Jonathan D. Marx
Personal Injury Lawyer
email (215) 939-4895
Areas of Practice
  • Personal Injury Litigation
  • Criminal Defense
  • Commercial Litigation

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 courtrooms, 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.

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
Request A Consultation
N/A Jonathan D. Marx attorney


Attorney Jonathan D. Marx is a founding partner at KaplunMarx, a graduate of Penn State, and a graduate of the Brooklyn Law School. He is deeply committed and dedicated to winning compensation – and winning justice – for the injured victims of negligence.