Peter A. Kuperstein is a partner in the Family Law practice group at Prince Lobel.  He has been practicing exclusively in all aspects of family law matters for almost 25 years.  Peter’s experience in family law matters includes issues ranging from uncontested actions to highly contested cases involving complex financial issues, business valuations, and custody disputes, as well as prenuptial agreements, paternity actions, modifications, and contempt actions at the trial and appellate levels.

Peter is a trained mediator and frequently is appointed by the Courts as a conciliator.  He has also served as a Guardian ad Litem and appointed under the Attorney Representing Children Program (ARC) in the Probate and Family Court.

Peter has extensive appellate experience and has authored numerous appellate briefs, as well as a writ of certiorari to the Supreme Court of the United States, on a wide range of family law issues.  He has been involved in several leading family law cases on such issues as alimony, child support, property division, custody, parent coordinators, jurisdiction, and prenuptial agreements. Peter was named a U.S. News and World Report “Best Lawyer in America” in Family Law in 2021.  Peter has also been recognized as a “Massachusetts Super Lawyer” for the past several years in the field of family law in Boston Magazine.

Peter’s work has been published in the Massachusetts Bar Association Section Review.  He is a member of the Greater Boston Family Law Inn of Court.  He is a cum laude graduate of Suffolk University Law School, where he served as an editor of the Suffolk University Law Review, and of Syracuse University.


  • Suffolk University Law School, J.D., cum laude, 1997
  • Syracuse University, B.S., 1992

Bar Admissions

  • Massachusetts

Memberships & Affiliations

  • American Bar Association, Section of Family Law
  • Boston Bar Association
  • Massachusetts Bar Association