District 18 - Donald MacKenzie

Upcoming Events:

  • Legislative Meeting - Monday, July 24th @ 1:00 PM

District 18Biography:

Since being elected to the Nassau County Legislature as Legislator for the 18th Legislative District, Don has made it a priority to fight for taxpayers. As a homeowner with a young family taxes are not a theoretical issue for him, he pays them also. During his time as a county legislator he has never voted for a tax increase. County government has become smaller and the county has become safer during that time. He will continue to work to make our communities safe to raise families while keeping county government smaller, transparent and accountable. 


Donald MacKenzie was first elected to the Nassau County Legislature in 2013 and was re-elected in 2015.  He represents the 18th Legislative District which includes N. Woodbury, N. Syosset, Laurel Hollow, Oyster Bay Cove, Oyster Bay, Cove Neck, Centre Island, Bayville, Mill Neck, Lattingtown, Locust Valley, Matinecock, the Brookvilles, Muttontown, East Norwich, Greenvale, East Hills and Glen Head.  He is the Chair of the Towns, Villages & Cities Committee, Vice Chair of the Public Safety Committee, a member of the Public Works Committee, and a member of the Finance Committee. He is also a non-voting member of the Nassau County Water Resources Board.

Don received his Juris Doctorate degree from the University of New Hampshire School of Law in 1995.  He was admitted to practice by the Appellate Division, Second Department in 1996. He is also admitted to practice in the Eastern and Southern Districts of the United States District Court. Following admission to the New York State Bar, he worked for Nassau County as a prosecutor for the Nassau County Traffic and Parking Violations Agency.  Subsequently, he worked in the Nassau County District Court Law Department as a Court Attorney serving in a confidential capacity for the District Court Judges. Thereafter, Mr. MacKenzie worked for a private law firm engaged in insurance defense litigation. He also served as a prosecutor in the Village of Roslyn Harbor. He is a practicing attorney in the private sector specializing in civil litigation.

Mr. MacKenzie is a lifelong resident of Oyster Bay Hamlet and attended Oyster Bay Schools. He currently resides in Oyster Bay with his wife and two children. His children now attend Oyster Bay Schools. He is involved with various youth and civic activities.