Butler was incorporated as a borough by an act of the New Jersey Legislature on March 13, 1901, from portions of Pequannock Township.[21][22]

Plumsted Township was incorporated as a township by an act of the New Jersey Legislature on March 11, 1845, from portions of Jackson Township, while the area was still part of Monmouth County. Plumsted Township became part of the newly created Ocean County on February 15, 1850.[21] The township was named for Clement Plumstead, an English Quaker who bought a large parcel of land, but never set foot in the area.[22][23]

Hardyston Township was set off from portions of Newton Township by Royal charter on February 25, 1762.[21][22] It was named after Josiah Hardy, who was royal governor of New Jersey from 1761 to 1763.[23][24] The original British spelling of Hardiston was Americanized to Hardyston after the American Revolutionary War.[25]

Its first settler James Johnston originally called the place “Spottiswoode”, named for his old place of residence in Scotland, and dates back to its original settlement in 1685.[21][22][23] It was also historically spelled Spottswood.[24]

Oradell was originally formed on March 8, 1894, as the borough of Delford, from portions of Harrington Township, Midland Township (now Rochelle Park) and Palisades Township.[21] 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.[22] The name “Delford” was a portmanteau created from the names of two communities within the new borough: Oradell and New Milford.[23] The Hotel Delford had been constructed in 1870 after the construction of the first railroad to reach the area.[24] On November 12, 1920, the borough’s name was officially changed to “Oradell”, based on the results of a referendum held ten days earlier.[21][25] Oradell derives its name from “ora” (Latin for “edge”) and “dell”.[26]

Bedminster was settled in 1710 by Dutch, Germans, and Scots-Irish immigrants. It was named after Bedminster, then in Somerset, England, and now a district of Bristol.[20][21] Bedminster Township was created by Royal charter on April 4, 1749, from portions of the Northern precinct. It was incorporated formally by an act of the New Jersey Legislature on February 21, 1798. Portions of the township were taken on March 28, 1912, to form Peapack-Gladstone.[22]

Runnemede was incorporated as a borough by an act of the New Jersey Legislature on March 23, 1926, from portions of the now-defunct Centre Township, based on the results of a referendum held on April 24, 1926. The boroughs of Bellmawr, Mount Ephraim, and Lawnside were simultaneously created during the same two-day period.[21] The derivation of the borough’s name is uncertain, though claims that it derives from a Native American term for “running water” have been refuted and connections to General George Meade or to “rum we need” for a nearby tavern are probably apocryphal.[22] Sources have cited the name as coming from Runnymede, England.[23]

Upper Saddle River had a per capita income of $73,639 and was ranked 20th in New Jersey based on data from the 2006–2010 American Community Survey (ACS) from the United States Census Bureau, more than double the statewide average of $34,858.[20] In the 2013–2017 ACS, Upper Saddle River had a median household income of $176,674 (ranked 8th in the state) and included 42.9% of households earning more than $200,000 annually.[21]

Newton was incorporated by an act of the New Jersey Legislature on April 11, 1864, from portions of Newton Township, which was also partitioned to create Andover Township and Hampton Township, and was then dissolved. Additional land was acquired from Andover Township in 1869 and 1927, and from Fredon Township in 1920.[19]

Kenilworth was incorporated as a borough by an act of the New Jersey Legislature on May 13, 1907, from portions of Cranford and Union Township, based on the results of a referendum held on June 18, 1907.[20]