[24] In the years before World War II, Andover Township was home to Camp Nordland, a retreat and gathering place covering 204 acres (83 ha) owned and operated by the German American Bund, an American Nazi organization devoted to promoting a favorable view of Nazi Germany.

Camp Nordland was shut down by the federal government after Germany declared war on the United States and sold at auction in 1944.

[25] The property eventually was acquired by Andover Township and is now called Hillside Park with a recreational hall and sports fields.

[27][28] The 2010 United States census counted 6,319 people, 2,070 households, and 1,590 families in the township.

Of all households, 19.2% were made up of individuals and 6.0% had someone living alone who was 65 years of age or older.

[19] The Census Bureau's 2006–2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $95,313 (with a margin of error of +/− $10,064) and the median family income was $105,554 (+/− $13,995).

[38] As of the 2000 United States census[16] there were 6,033 people, 1,889 households, and 1,499 families residing in the township.

16.1% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older.

[46][47][48] For the 119th United States Congress, New Jersey's 5th congressional district is represented by Josh Gottheimer (D, Wyckoff).

[51] For the 2024-2025 session, the 24th legislative district of the New Jersey Legislature is represented in the State Senate by Parker Space (R, Wantage Township) and in the General Assembly by Dawn Fantasia (R, Franklin) and Mike Inganamort (R, Chester Township).

At an annual reorganization meeting held in the beginning of January, the board selects a Commissioner Director and Deputy Director from among its members, with day-to-day supervision of the operation of the county delegated to a County Administrator.

[63] Among the township's 2010 Census population, 63.0% (vs. 65.8% in Sussex County) were registered to vote, including 80.8% of those ages 18 and over (vs. 86.5% countywide).

[83][84][85][86] The district's board of education is comprised of nine members who set policy and oversee the fiscal and educational operation of the district through its administration,[87] with Andover Township assigned eight of the nine seats, based on the population of the two constituent municipalities.

NJ Transit is working on the Lackawanna Cut-Off Restoration Project through the southern part of the township.

[93] People who were born in, residents of, or otherwise closely associated with Andover Township include: