Hillsborough Township covers a broad area of southern Somerset County, combining suburban neighborhoods, farmland, wooded ridges, historic villages, and growing commercial corridors. Route 206 is the primary north-south road, linking the township with Somerville, Montgomery, and Princeton. The Millstone River forms much of the eastern boundary, while the Sourland Mountain region shapes the western landscape. Duke Farms, a major environmental and cultural property, occupies a large area near the Raritan River. Hillsborough includes several local communities and historic areas, including Neshanic, Flagtown, and Belle Mead, rather than one single downtown. Residential growth has expanded around schools, shopping centers, and municipal facilities while significant open space remains. The township’s location provides access to Interstate 287, Route 1, the Princeton area, and employment centers throughout Somerset and Middlesex counties.