The 25th District encompasses 21 communities in Morris and Somerset counties: Bernardsville, Boonton Borough and Boonton Township, Chester Borough and Chester Township, Denville, Dover, Mendham Borough and Mendham Township, Mine Hill, Morris Township, Morristown, Mount Arlington, Mountain Lakes, Netcong, Randolph, Rockaway, Roxbury, Victory Gardens, Washington and Wharton.
One-third of voters are registered with the GOP, 31% as Democrats, and most of the rest are unaffiliated.
All the incumbents are Republicans and all are seeking reelection. They are Sen. Anthony M. Bucco, former Boonton Board of Education member, and Assembly members Brian Bergen, a Denville small-business owner, and Aura Dunn of Mendham.
On the Democratic ballot, Morris Township Mayor Jeffrey Grayzel is running for the Senate, while Lauren Barnett and Patricia Veres are seeking the Assembly nominations.