Hackettstown is located in Warren County. About 10,248 people live here (as of 2020). Between 2010 and 2020, the population grew from 9,724 to 10,248. The region is at 79 meters above sea level. There are about 431 streets in Hackettstown. The postal codes are 07840. The dialing code is 908. Hackettstown is town in Warren County, New Jersey, United States. Among other things, Hackettstown has public Transport, restaurants, cafés, supermarkets, clothing Stores, schools, banks and hairdressers. More information at
www.hackettstown.net.