Template:NJ Mercer County Commissioners

Mercer County is governed by a County Executive who oversees the day-to-day operations of the county and by a seven-member Board of County Commissioners that acts in a legislative capacity, setting policy. All officials are chosen at-large in partisan elections, with the executive serving a four-year term of office while the commissioners serve three-year terms of office on a staggered basis, with either two or three seats up for election each year as part of the November general election. , the County Executive is Daniel R. Benson (D, Hamilton Township) whose term of office ends December 31, 2027. Mercer County's Commissioners are:

Lucylle R. S. Walter (D, Ewing Township, 2026), Chair John A. Cimino (D, Hamilton Township, 2026), Samuel T. Frisby Sr. (D, Trenton, 2024), Cathleen M. Lewis (D, Lawrence Township, 2025), Vice Chair Kristin L. McLaughlin (D, Hopewell Township, 2024), Nina D. Melker (D, Hamilton Township, 2025) and Terrance Stokes (D, Ewing Township, 2024).

Mercer County's constitutional officers are: Clerk Paula Sollami-Covello (D, Lawrence Township, 2025), Sheriff John A. Kemler (D, Hamilton Township, 2026) and Surrogate Diane Gerofsky (D, Lawrence Township, 2026).