The Borough of Roselle Park is governed by an elected Mayor and six Councilpersons. Roselle Park is divided into five election districts, referred to as wards, with one Councilperson elected from each ward, and one Councilperson elected at large. The Mayor is elected to a four-year term and Councilpersons are elected to three-year terms.

The Governing Body of the municipality holds its regular meetings in the Council Chamber at Borough Hall on the 1st and 3rd Thursday of each month at 7:00 PM.

Roselle Park is located in Union County and is represented in New Jersey's 21st District and the United States 10th District.