Federal, state and county representation
Hillside is located in the 10th Congressional District and is part of New Jersey's 28th state legislative district.
For the 119th United States Congress, New Jersey's 10th congressional district is represented by LaMonica McIver (D, Newark). New Jersey is represented in the United States Senate by Democrats Cory Booker (Newark, term ends 2027) and Andy Kim (Moorestown, term ends 2031).
For the 2026–2027 session, the 28th legislative district of the New Jersey Legislature is represented in the State Senate by Renee Burgess (D, Irvington) and in the General Assembly by Chigozie Onyema (D, Newark) and Cleopatra Tucker (D, Newark).
Union County is governed by a Board of County Commissioners, whose nine members are elected at-large to three-year terms of office on a staggered basis with three seats coming up for election each year, with an appointed County Manager overseeing the day-to-day operations of the county. At an annual reorganization meeting held in the beginning of January, the board selects a Chair and Vice Chair from among its members. As of 2026, Union County's County Commissioners are:
Vice Chair Rebecca Williams (D, Plainfield, 2028),
Chairman Joesph Bodek (D, Linden, 2026),
James E. Baker Jr. (D, Rahway, 2027),
Michele Delisfort (D, Union Township, 2026), Lourdes M. Leon (D, Elizabeth, 2026),
Alexander Mirabella (D, Fanwood, 2027) Kimberly Palmieri-Mouded (D, Westfield, 2027). Stanley J. Neron (D, Elizabeth, 2028), Joseph Signorello III (D, Roselle Park, 2028)
Constitutional officers elected on a countywide basis are:
Clerk Vacant - Incumbent Clerk Joanne Rajoppi (D, Union Township) died on July 16, 2026. Her death triggered a special election for a full five-year term to be held concurrently with the November 2026 general election. Deputy Clerk Clara Fernández assumes the powers of the office until the vacancy is filled.
Sheriff Peter Corvelli (D, Kenilworth, 2026) and
Surrogate Christopher E. Hudak (D, Clark, 2027).