That name lasted for less than a year, with Harrison Township adopted as of April 1, 1845.

[25][26] The township's voters passed a referendum in 2009 permitting alcohol by consumption in restaurants.

A second referendum was passed by the voters in 2015 allowing sales of packaged alcoholic goods in liquor stores.

[1][2] Mullica Hill is an unincorporated community and census-designated place (CDP) located within Harrison Township that had a 2010 Census population of 3,982.

[32][33][34] Multiple homes were destroyed when the area was hit by an EF3 tornado on September 1, 2021, produced by the remnants of Hurricane Ida.

[35] The 2010 United States census counted 12,417 people, 3,942 households, and 3,315 families in the township.

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.

[18] 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).

[47] As of the 2000 United States census,[15] there were 8,788 people, 2,848 households, and 2,323 families residing in the township.

15.3% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older.

[57] For the 119th United States Congress, New Jersey's 2nd congressional district is represented by Jeff Van Drew (R, Dennis Township).

[58] New Jersey is represented in the United States Senate by Democrats Cory Booker (Newark, term ends 2027) and Andy Kim (Moorestown, term ends 2031).

[59] For the 2024-2025 session, the 3rd legislative district of the New Jersey Legislature is represented in the State Senate by John Burzichelli (D, Paulsboro) and in the General Assembly by David Bailey (D, Woodstown) and Heather Simmons (D, Glassboro).

[105] Students from across the county are eligible to apply to attend Gloucester County Institute of Technology, a four-year high school in Deptford Township that provides technical and vocational education.

[106] Friends School Mullica Hill is a private, nonsectarian, coeducational day school located in the Mullica Hill section of Harrison Township that was established in 1969 and now serves students pre-kindergarten through eighth grade.

[116] NJ Transit bus service is available between Bridgeton and Philadelphia on the 410 route.

[117][118] People who were born in, residents of, or otherwise closely associated with Harrison Township include: