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Jonathan David Marx

Jonathan David Marx

also known as Jon Marx

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About Me

I graduated from Brooklyn Law School in 1986 and am proud that I have focused my practice of law on helping those injured and those accused of crimes for over 25 plus years.  I have been a trial lawyer ever since passing the bar exam in the summer of 1986, addmitted to practice in both Pennsylvania and New Jersey. As for my personal life, I am married and have 3 great children and enjoy cycling.


Photos and Videos

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Practice Areas


  1. Criminal Defense: 50%
  2. Personal Injury: 50%



Free Consultation (60 minutes)

Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

53 total 

  • James Donald Garrett

    Jonathan Marx is a talented and well respected personal injury attorney. I would highly recommend him to anyone looking for a lawyer who knows the law, truly cares about protecting the rights of his clients and getting them the most favorable result possible.


    James Garrett Criminal Defense Attorney
    Relationship: Fellow lawyer in community

  • Karim Patrick Husain

    I have known Jon for over seven years. He is an excellent attorney who cares deeply about his clients. I give him my highest recommendation.


    Karim Husain Business Attorney
    Relationship: Worked together on matter

Contact Info

KaplunMarx, PLLC

333 E. City Ave.
Suite 300
Bala Cynwyd, PA, 19004

KaplunMarx, PLLC

10000 Lincoln Dr E
Marlton, NJ, 08053

KaplunMarx, PLLC

1515 Market Street
Suite 1200
Philadelphia, PA, 19102




Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Top 100 Litigators in PennsylvaniaAmerican Society of Legal Advocates2015
Top Contributor Personal InjuryAVVO2014
Top 100 Litigation Lawyers in PennsylvaniaAmerican Society of Legal Advocates2014
Top Contributor Criminal DefenseAVVO2014
Who's Who In American LawWho's Who In American Law2014
Who's Who In American LawWho's Who In American Law2013
Who's Who In American LawWho's Who In American Law2012
Who's Who In American LawWho's Who In American Law2011
Who's Who In American LawWho's Who In American Law2010
Coaching AwardMLGBA2003
Work Experience
TitleCompany NameDuration
PartnerKaplunMarx, PLLC2013 - Present
AssociateLaw Offices of Robert Katz2003 - 2013
AssociateKane & Silverman, PC2001 - 2003
AssociateLaw Office of Milton J. Frank1998 - 2001
Association NamePosition NameDuration
Pennsylvania Bar AssociationAttorney Member1986 - Present
New Jersey State Bar AssociationAttorney Member1986 - Present
Beta Sigma BetaMember1980 - Present
Legal Cases
Case NameOutcome
Premises Liability$700,000.00 Settlement
Auto Accident$150,000.00 Verdict achieved
Gregory v. Global LanscapingSettlement
See all Legal Cases 
School NameMajorDegreeGraduated
Brooklyn Law SchoolLawJD - Juris Doctor1986
Pennsylvania State UniversityGeneral Arts & SciencesBA - Bachelor of Arts1983
Speaking Engagements
Conference NameTitleDate
Main Line IIIPersonal Injury Cases - The Do's and Dont's2014
Business Leaders Spotlight ShowHow to Maximize Your Personal Injury Case2014
AEC Attorney MeetingPennsylvania Personal Injury Do's & Dont's2014
CCI - New JerseyState and Federal Law relating to medical marijuana2013