Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* Lawyer John P Johnston, Practice Areas No known practice areas. is located in the city of Adelphia, the state of New Jersey. Attorney legal address John P. JohnstonP.O. Box 343Adelphia, NJ, 07710. For more information, please call (908) 839-8733 Your comments* (not for publishing) * — Required information John P Johnston ← View details John P. JohnstonP.O. Box 343Adelphia, NJ, 07710, Adelphia, New Jersey (908) 839-8733