Hillsborough Township is a township located in Somerset County within the state of New Jersey in the United States. Situated in the Raritan Valley region, it serves as a suburban and exurban bedroom community for New York City within the broader New York Metropolitan Area.
The population of the township has shown steady growth over recent decades. According to the 2020 United States census, the population was 43,276, marking an increase of approximately 13 percent from the 2010 count of 38,303.