Trenton–Mercer Airport is a county-owned, joint civil–military, public airport located four miles northwest of Trenton in the West Trenton section of Ewing Township, Mercer County, New Jersey. Formerly known as Mercer County Airport, the airport serves one scheduled airline plus general and corporate aviation. The U.S. Department of Transportation reports that approximately 301,000 passengers arrived and 300,000 departed at the airport in the 12 months ending July 2023, for a total of 601,000 passengers.

West Trenton is an unincorporated community within Ewing Township in Mercer County, New Jersey, United States. It is a suburban area located adjacent to the northwestern portion of the city of Trenton, from which it derives its name. Located at the intersection of Bear Tavern Road/Grand Avenue and West Upper Ferry Road, it is one of the oldest settlements in Ewing Township.