The Census Bureau's 2006–2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $102,162 (with a margin of error of +/− $10,851) and the median family income was $121,366 (+/− $9,400). For every 100 females ages 18 and older there were 94.2 males. For every 100 females, the population had 95.9 males. ģ1.8% of the population were under the age of 18, 7.5% from 18 to 24, 22.8% from 25 to 44, 29.6% from 45 to 64, and 8.4% who were 65 years of age or older. The average household size was 3.15 and the average family size was 3.47. Of all households, 13.3% were made up of individuals and 5.4% had someone living alone who was 65 years of age or older. Of the 3,942 households, 49.9% had children under the age of 18 72.7% were married couples living together 7.9% had a female householder with no husband present and 15.9% were non-families. Hispanic or Latino of any race were 3.01% (374) of the population. There were 4,089 housing units at an average density of 213.6 per square mile (82.5/km 2). The population density was 648.7 per square mile (250.5/km 2). The 2010 United States census counted 12,417 people, 3,942 households, and 3,315 families in the township. Demographics Historical populationġ930–1990 2000 2010 Multiple homes were destroyed when the area was hit by a strong EF3 tornado on September 1, 2021, produced by the remnants of Hurricane Ida. The township borders the Gloucester County municipalities of East Greenwich Township, Elk Township, Glassboro, Mantua Township and South Harrison Township and Woolwich Township. Other unincorporated communities, localities and place names located partially or completely within the township include Ewan, Ewans Mills, Heritage, Jefferson and Sherwin. Richwood is a CDP that is in portions of both Harrison Township and Mantua Township, which had a 2010 population of 3,459, of which 3,400 were in Harrison Township and 59 in Mantua Township. Mullica Hill is an unincorporated community and census-designated place (CDP) located within Harrison Township that had a 2010 Census population of 3,982.
The township's voters passed a referendum in 2009 permitting alcohol by consumption (in a restaurant). Since the institution of Prohibition, Harrison had been a dry township, where alcohol could not be sold. The township was named for President William Henry Harrison.
That name lasted for less than a year, with Harrison Township adopted as of April 1, 1845. Harrison Township was originally formed as Spicer Township by an act of the New Jersey Legislature on March 13, 1844, from portions of Greenwich Township and Woolwich Township. Census, the township's population was 12,417, reflecting an increase of 3,629 (+41.3%) from the 8,788 counted in the 2000 Census, which had in turn increased by 4,073 (+86.4%) from the 4,715 counted in the 1990 Census. Harrison Township is a township in Gloucester County, New Jersey.