4905 West Tilghman Street, Suite 300, Allentown, PA 18104 - (484) 895-2300

Marshall Dennehey has had a presence in the Lehigh Valley since 1990, when it opened an office in downtown Allentown.  The Lehigh Valley is the fourth largest metropolitan area in Pennsylvania comprised of Allentown, Bethlehem, Easton and their surrounding townships and boroughs.  After 16 years in Bethlehem, Marshall Dennehey’s office is returning to Allentown.  Since its inception, the office has grown on its record of hard work and the successful delivery of strong advocacy and responsive service to our clients.

The Allentown office is staffed with civil defense litigation attorneys who devote their complete professional attention to servicing clients in the Lehigh Valley region and surrounding areas including Berks, Carbon, Lehigh, Monroe, Northampton and Schuylkill Counties. These experienced attorneys have varied practices and focus on matters across the firm's four main departments: casualty, professional liability, health care and workers' compensation.

Led by office managing attorney, Jason M. Banonis, the Allentown office provides our clients with an effective defense litigation team of professionals backed by the intellectual property and broad-based experience of the entire firm, permitting localized and economical representation of insurers and self-insured clients.

For more information about the Allentown office, please contact Jason at (484) 895-2338 or




  1. Take NE Extension of the Pennsylvania Turnpike to Lehigh Valley/Allentown exit.
  2. Take Rt. 22 E; then a quick right onto Rt. 309S/Quakertown  to Tilghman St. W. exit.
  3. Turn right to 4905 W. Tilghman. *


  1. Take Rt. 78 W.  to 33 N.
  2. Take 33N to Rt. 22 W. toward Allentown/Bethlehem
  3. Take Rt. 22W to Rt. 309S/Quakertown to Tilghman St. W. exit
  4. Turn right to 4905 W. Tilghman*

*We are in the MetLife Bldg. just pass the K-Mart Shopping Center on the right and next to Lehigh Valley Health Network.


Jason Banonis Receives 2020 “Defense Attorney of the Year” Award from the Pennsylvania Defense Institute

Jason Banonis, shareholder and managing attorney of Marshall Dennehey’s Allentown, PA office, is the recipient of the 2020 “Defense Attorney of the Year,” award from the Pennsylvania Defense Institute (PDI). Mr. Banonis received the award for his statewide efforts with the plaintiff’s bar and the state legislature to reopen Pennsylvania Courts and law offices during the ongoing Covid-19 shutdown.

Jason Banonis Appointed to Pennsylvania Bar Association Task Force

Jason Banonis, managing attorney of Marshall Dennehey’s Allentown, PA office, has been appointed by Pennsylvania Bar Association President David E. Schwager to a 29-person task force to enable continuation of the legal system during emergencies similar to the Covid-19 pandemic. As one of the civil defense bar representatives, Mr. Banonis will assist the panel in developing recommendations with regard to processes and technology that will enable the legal system to continue operations under crisis conditions. 

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