John J. Duffy

ISLN: 907730161
Email: click here to contact

John J. Duffy makes no secret of his love of the courtroom. A graduate of LaSalle University and the Villanova University School of Law, he was admitted to practice on November 19, 1962. Since that time he has tried hundreds of criminal cases in state and federal courts across the country, and has been widely recognized as the best criminal trial lawyer in Chester County. His trial experience runs the gamut of state and federal criminal prosecutions, spanning capital homicide cases, public corruption cases (such as ABSCAM and the Pennsylvania Lottery Fix), and complex drug and white collar conspiracy cases. He enjoys an AV Martindale rating.

Outside the courtroom, he is a founding governor and Board Member of Lawyers Concerned for Lawyers (an assistance program which offers confidential help to lawyers, judges, and their family members). He has a long, proud history of service to The Caron Foundation, a nationally recognized, non-profit addiction, and chemical dependency treatment center providing services for both adults and adolescents. A Foundation Board member for over 29 years, John has served on its Executive Committee for over 25 years and was twice elected Chairman of the Board. In 1998, he was named the first recipient of the Richard J. Caron Foundation Outstanding Alumni Award, and in July, 2007, he was again honored when the Caron Foundation named him Chairman Emeritus. In 1994, then Governor Robert P. Casey appointed John to the Governor’s Advisory Council on Alcohol and Drug Abuse, where he has served with distinction. Clean and sober for more than 34 years, John’s avocation consists in extending a helping hand to those who suffer from alcoholism or other substance abuse. 

John has been a frequent lecturer and panelist in professional educational and leadership programs, on behalf of and as a member of The National and Pennsylvania Association of Criminal Defense Lawyers, the American and Pennsylvania Bar Associations, and the American and Pennsylvania Trial Lawyers Association.

Practice Areas

Criminal Law

Admitted: 1962, Pennsylvania; 1967, U.S. Supreme Court; 1963, U.S. Court of Appeals, 3rd Circuit; 1965, U.S. Court of Appeals, 5th Circuit; 1966, U.S. Court of Appeals, 7th Circuit
Law School: Villanova University, J.D.
College: LaSalle College, B.S.
MilitaryService: S/Sgt, U. S. Air Force 1950 - 1954

Areas of Practice

  • Criminal Trials
  • Civil Trials
  • Personal Injury
  • Conviction Review

Office Hours

Monday through Friday, 9:00 - 5:00,
                 and by appointment

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