Allamuchy, NJ

ZIP code 07820 covers the area of Hackettstown, New Jersey. This bustling town is home to Centenary University and the Mars Chocolate North America headquarters. Hackettstown is also famous for its annual Mummers Parade and being the birthplace of the iconic M&M's candy. The zip code area boasts a mix of residential neighborhoods, local businesses, and recreational facilities, making it a vibrant community in Warren County.