According to British colonial records, the first permanent European settlement at Morristown occurred in 1715, when a settlement was founded as New Hanover by colonists from New York and Connecticut. Morris County was created on March 15, 1739, from portions of Hunterdon County. The county, and ultimately Morristown itself, was named for the popular Governor of the Province, Lewis Morris, who championed land ownership rights for colonists.[19][20]

The borough of Palisades Park was created by an act of the New Jersey Legislature on March 22, 1899, from portions of Ridgefield Township. A portion of its area was annexed by the neighboring borough of Fort Lee in April 1909.[24][25][26] The borough was named for its location atop the New Jersey Palisades.[27][28]

Middle Township was formed as a precinct on April 2, 1723, and was incorporated by Township Act of 1798 of the New Jersey Legislature on February 21, 1798 as one of New Jersey’s initial group of 104 townships. Portions of the township have been taken to form Anglesea Borough (on June 13, 1885; now North Wildwood City), Avalon Borough (April 18, 1892), Wildwood (May 1, 1895), Stone Harbor Borough (April 3, 1914) and West Wildwood (April 21, 1920).[22] The township’s name came from its location when Cape May was split into three townships in 1723 at the same time that Lower Township and Upper Township were created.[23]

Jefferson Township was formed as a township by an act of the New Jersey Legislature on February 11, 1804, from portions of Pequannock Township and Roxbury Township.[23][24] The township was named after Thomas Jefferson, the President of the United States at the time the Township was created.[25][26] The township is situated in the northernmost part of Morris County bordering both Passaic and Sussex counties.

Pleasantville was originally incorporated as a borough by an act of the New Jersey Legislature on January 10, 1889, from portions of Egg Harbor Township, based on the results of a referendum held on December 15, 1888. Pleasantville was incorporated as a city on April 14, 1914, replacing Pleasantville borough, based on the results of a referendum held that same day.[17] the city was named by David Ingersoll for its surroundings.[18]

The first European to settle the township was Hendrick Jacobs Falkenberg, who likely arrived by 1693 when he does not appear on a census of the Swedes along the Delaware River, where he had lived for nearly three decades.[23] Though he was from Holstein (now in Germany), his first wife was a Finn and part of the Swedish community. Falkenberg settled on an 800-acre tract of land that he had acquired from the Lenni Lenape Native Americans in 1674, and a 1697 deed re-confirmed this earlier purchase. This tract included the two islands of Monhunk and Minnicunk later known as Osborn Island and Wills Island.[24] Falkenberg was a linguist, fluent in the Lenape language, and was considered southern New Jersey’s foremost language interpreter involving land transactions between the Indians and the European settlers, particularly the English Quakers.[25]

Moorestown was authorized to be incorporated as a township by an act of the New Jersey Legislature on March 11, 1922, from portions of Chester Township (now Maple Shade Township), subject to the approval of voters in the affected area in a referendum. Voters approved the creation on April 25, 1922.[21][22] The township is named for a Thomas Moore who settled in the area in 1722 and constructed a hotel[23] though other sources attribute the name to poet Thomas Moore.[24]

Prior to 1916, the area was known as Dundee Lake, a section of Saddle River Township.[4] Residents of the Dundee Lake area voted on April 18, 1916, to secede from Saddle River Township to form the Borough of East Paterson.[3] In 1917, residents of the Rosemont section of Saddle River Township voted to be annexed to East Paterson.[4] In November 1972, residents voted to change the name of the borough to Elmwood Park. The new name became official on January 1, 1973.[4]

The borough had the 10th-highest property tax rate in New Jersey, with an equalized rate of 4.810% in 2020, compared to 3.470% in the county as a whole and a statewide average of 2.279%.[21] Geographically, the borough is part of the South Jersey region.

Millburn was created as a township by an act of the New Jersey Legislature on March 20, 1857, from portions of Springfield Township, when Union County was formed.[24] Earlier known variously as Milltown, Millville, Rum Brook and Vauxhall, the name “Millburn” was adopted before the township was established. The township’s name derives from the burn (Scottish for a stream) that powered mills in the area.[25][26]