Badge - AV Peer Review Rated, AV Preeminent 5.0 out of 5 Rating.
Badge - The Best Lawyers in America
Badge - Best Lawyers 2021
Badge - Lenahan & Dempsey P.C. Recognized by Best Lawyers 2021
Badge - Rated by Super Lawyers 2020.

Firm History

From its first day back in 1948, Lenahan & Dempsey was formed to be a different kind of law firm.

Founded by John R. Lenahan, Sr., and William J. Dempsey, the firm was created to protect the rights of individuals. The Firm was never shy about taking on big corporations or insurance companies when the rights of a client were at stake.

We are Here to Serve You

Dedication to the law and our clients has led to tremendous growth. Lenahan & Dempsey is now one of, if not the largest personal injury law firm in Northeastern and Central Pennsylvania devoted to protecting the rights of the seriously injured. With a staff of over 50 talented individuals, we maintain offices across our practice area. We are also available for hospital, nursing home or home visits if needed.


With a firm our size come important resources such as medical consultants as well as access to a nation-wide network of consultants in fields ranging from Architecture to Zoology. We also maintain a large in-house support staff.

We Represent Seriously Injured Clients

At Lenahan & Dempsey, we represent seriously injured individuals in all types of personal injury cases. We are frequently the law firm other lawyers and law firms turn to for assistance when going up against a large corporation or insurance company.

Members of our firm are often called upon to lecture at legal conferences, teaching other law firms intricacies involved in highly complicated laws or trial practices.


Many of our lawyers have achieved high honors, such as being listed in Best Lawyers in America®, Pennsylvania Super Lawyers®, Certification by the National Board of Trial Advocacy as Civil Trial Specialists® and The Bar Register of Preeminent Lawyers® among other honors. For more information on the selection process for Best Lawyers® and Super Lawyers®, please see our Honors & Distinctions page by clicking here.

Lenahan & Dempsey, Trial Attorneys

Lenahan & Dempsey handles civil cases through all phases of litigation including settlement conferences as well as in trials and appeals in state and federal courts. We have even successfully argued before the United States Supreme Court.

Client Reviews
Brian Lenahan is the best I would recommend him to anyone who wants a lawyer who will fight for you and win a fair settlement. Don Martin
My attorney was always quick to call me back and reassure me that I had nothing to worry about and let him worry about it. They did everything that they could for me and it was my decision to settle, but they helped me every step of the way. Meghan Kathleen
Always treated with kindness and respect they were my lifeline for 8 yrs never missing a beat always informed THANKS could not have gotten where I am today without you. Rene Walter