Wallington was created as a borough on January 2, 1895, based on a referendum held on December 31, 1894, from area taken from Bergen Township and Saddle River Township.[21] The borough was formed during the “Boroughitis” phenomenon then sweeping through New Jersey, in which 26 boroughs were formed in Bergen County alone in 1894, with Wallington the last of the 26 to be formed by an 1894 referendum.[22] Sections of Wallington were ceded to Garfield in 1898.[21][23][24] The borough is said to have been named for Walling Van Winkle (1650–1725), who built a home in the future borough.[25][26][27]

Bound Brook was originally incorporated as a town by an act of the New Jersey Legislature on March 24, 1869, within portions of Bridgewater Township. On February 11, 1891, it was reincorporated as a borough, based on the results of a referendum held on the previous day.[21][22]

The population increased by 369 (+3.4%) from the 10,807 counted in the 2000 Census, which had in turn increased by 2,539 (+30.7%) from the 8,268 counted in the 1990 Census.[22] As of the 2010 Census, almost one-fifth of the town’s population resides in the Galaxy Towers, a trio of residential skyscrapers overlooking the Hudson River.[23][24][25]

The community was originally incorporated as the borough of Riverside by an act of the New Jersey Legislature on June 30, 1894, from portions of Midland Township, based on the results of a referendum held the previous day. On December 1, 1930, the borough’s name was changed to River Edge.[22] The borough was formed during the “Boroughitis” phenomenon then sweeping through Bergen County, in which 26 boroughs were formed in the county in 1894 alone.[23] The borough was named for its location along the Hackensack River.[24]

The area that would become the borough had been known as Corona from the mid-1800s and grew up around the two local railroad stations. The name “Hasbrouck” was chosen in 1889 to honor Jacob Dillon Hasbrouck (1842–1918), general manager of the New Jersey and New York Railroad.[21][22] In the face of local opposition, the name change was promoted as improving the community’s public perception and avoiding confusion with the Corona, Queens neighborhood, while “Heights” was added to avoid confusion with a similarly named community in upstate New York.[23]

The borough has been one of the state’s highest-income communities. Based on data from the American Community Survey for 2013–2017, Glen Rock residents had a median household income of $162,443, ranked 6th in the state among municipalities with more than 10,000 residents, more than double the statewide median of $76,475.[21]

As of the 2010 United States Census, the borough’s population was 12,098,[21][22][22][23] reflecting a decline of 325 (-2.6%) from the 12,423 counted in the 2000 Census, which had in turn increased by 791 (+6.8%) from the 11,632 counted in the 1990 Census.[24]

The Freeholds region, which includes the borough and Freehold Township (which completely surrounds the borough), is a commercial hub for central New Jersey. The borough is located relatively close to the Raritan Bayshore communities to the north, such as The Amboys, Old Bridge, Matawan, Keyport, Keansburg, and Middletown, along with being relatively close to the Tri-City region of Jersey Shore municipalities (and their vicinities) to the east, including Red Bank, Long Branch, and Asbury Park.[26]

New Jersey Monthly magazine ranked Upper Township as its 2nd best place to live in its 2008 rankings of the “Best Places To Live” in New Jersey.[19]

Haddonfield was incorporated by an act of the New Jersey Legislature on April 6, 1875, within portions of Haddon Township following a referendum on the same day. The borough became an independent municipality in 1894.[22] The borough was named for Elizabeth Haddon, an early settler of the area.[23][24]