Hanover Township is a township in Morris County, New Jersey, United States. At the 2010 United States Census, the township's population was 13,712, reflecting an increase of 814 (+6.3%) from the 12,898 counted in the 2000 Census, which had in turn increased by 1,360 (+11.8%) from the 11,538 counted in the 1990 Census. The township comprises the unincorporated communities of Whippany and Cedar Knolls.
Located just north of the historic town of Morristown (separated by a thin strip of Morris Township) and adjacent to the regional Morristown Municipal Airport, Hanover Township offers many public attractions including the Whippany Railway Museum, the Frelinghuysen Arboretum and the Morris County Library. Patriots' Path, a wilderness walkway and bike trail that stretches for 26 miles (42 km), also passes through the township along the Whippany River.