Learn More about

DA Michael Mcmahon

Michael McMahon has been privileged to serve the people of Staten Island as their District Attorney since January 1, 2016. He has greatly transformed the office and has built a modern District Attorney’s office focused on precision prosecution, problem-solving crime prevention, and bridge building between law enforcement and the communities it protects.

McMahon has utilized his broad and deep experience in law and public service to implement and pursue the issues he promised Staten Islanders to address. He has successfully attacked the Island’s criminal justice issues: From the opioid epidemic to traditional street crime; from domestic violence to economic crime; from crimes against our children to assaults on women and seniors; and creating a new unit to protect animals. McMahon continues to work with partners in law enforcement, especially our police officers and detectives, to drive down crime numbers and keeps Staten Islanders safer.


Prior to becoming Staten Island’s District Attorney, Michael McMahon pursued a successful four-decade long career in law and public service. As an attorney, McMahon litigated cases in all courts across the State and tried dozens of matters to verdict. He was a senior partner in a boutique law firm he cofounded and was a partner in a major Park Avenue firm as well.

At the same time, McMahon heard the call of public service and was extremely active in a career serving the people of Staten Island on the local, City, State, and federal levels. He began as a local civic association and community board member, then became counsel to two N.Y.S. Assemblymembers and a City Councilman. In 2001, McMahon successfully ran for the North Shore City Council seat where he served for three terms. McMahon professionalized the Council office, implementing ethical and accountability standards. At the same time, he became the first Chair of the Committee on Sanitation and passed a twenty-year plan that put a lock forever on the Fresh Kills Landfill, converted it to a parkland, and saved and expanded recycling. He also passed laws that reined in the Island’s wild overdevelopment, mandated nurses in every school and forced the City to expand ferry service.

In November 2008, McMahon was elected to represent Staten Island and Southern Brooklyn in the U.S. House of Representatives.

Here, McMahon continued to successfully represent his constituents by helping pass the James Zadroga 9/11 Compensation law, and the legislation that created the Iron Dome air defense system over Israel. He created the Invisible Wounds Caucus which focused on Veterans’ Mental Health issues including the unacceptable rash of suicides. McMahon also secured the funding to expand and modernize the stretch of the Staten Island Expressway between Victory Boulevard and the Verrazano Bridge, the complete renovation of the St. George Ferry Terminal, and the reconstruction of subway stations in Brooklyn.

Michael McMahon is married to Supreme Court Justice Judith N. McMahon and they have two children, Joseph, married to Irina Cazan, and Julia. They are also proud owners of Scoutyann, their sixteen year old West Highland White Terrier.