what county is raritan, nj
Raritan is a Borough in Somerset County, New Jersey, United States. As of the United States 2010 Census, the borough population was 6,881. Raritan is located at 40Â°34â²17â³N 74Â°38â²15â³W / 40.571302Â°N 74.637405Â°W / 40.571302; -74.637405 (40.571302, -74.637405). According to the United States Census Bureau, the borough has a total area of 2.0 square miles (5.3 km2), all of it land. Raritan is in Raritan Valley ( a line of cities in central NJ). Raritan is in the western division of Raritan Valley along with Branchburg and Bridgewater.