Somerville is the county seat of Somerset County and a traditional downtown center in the Raritan Valley. Its commercial district includes restaurants, shops, offices, civic buildings, cultural destinations, and historic streets surrounding Main Street and the county courthouse. The NJ Transit station on the Raritan Valley Line provides service toward Newark and New York connections. U.S. Routes 202 and 206, Route 28, and nearby Interstate 287 connect Somerville with Bridgewater, Raritan, Hillsborough, and the wider region. Residential neighborhoods and apartment communities extend around the downtown, while healthcare and professional facilities contribute to daily activity. Somerville developed as a crossroads, railroad town, and government center, and its historic building stock remains an important part of the borough's identity. The municipality's walkable center and regional transportation access make it one of central New Jersey's most recognizable small urban downtowns.