Trenton is based in Red Hook, Brooklyn. Trenton is strictly an industrial area in Portland, housing multiple low-rise manufacturing plants, warehouses and offices for various fictional products and services in the game. Trenton's proximity with neighboring Portland Harbor and Atlantic Quays makes it nothing short of ideal for businesses to ship products or import materials via the harbor.
Places of interest
The area is only controlled by a gang during 2000, which ones are the Southside Hoods, although in other years it isn't inhabited by a gang, although senior Leone Family gang member Joey Leone owns a garage in the district.
Other notable businesses based in Trenton include AMCO, Bitch'n' Dog Food (in 2001), Don Kiddick's Sausage Factory (in 1998), Liberty Pharmaceuticals, Mean Street Taxis, Liberty City Sawmills, an unnamed bus depot (with spawning Coaches). The Now and Zen Dojo is mentioned to be located in Trenton, but it doesn't actually appear in-game.