Kearny was originally formed as a township by an Act of the New Jersey Legislature on April 8, 1867, from portions of Harrison Township. Portions of the township were taken on July 3, 1895, to form East Newark. Kearny was incorporated as a town on January 19, 1899, based on the results of a referendum held two days earlier.
According to the United States Census Bureau, the town has a total area of 10.2 square miles (26.4 km²), of which, 9.1 square miles (23.7 km²) of it is land and 1.0 square miles (2.7 km²) of it (10.30%) is water.
Kearny distinguishes itself from neighboring towns in its balanced use of space; a blend of residence, business, industrial, educational, and park. Main thoroughfares include the eponymous Kearny Avenue (the local segment of Ridge Road / Frank E. Rodgers Boulevard), Bergen Avenue, Midland Avenue, Schuyler Avenue and Passaic Avenue.
A number of small memorial parks running along Passaic Ave (adjacent to the Passaic River) are collectively called River Bank Park. The largest, located on the colloquial "Bunny Hill", is a gift from Kearny's veterans. It is named after a small zoo named Bunnyland, which was maintained by the local Kiwanis Club, that occupied part of the present Bunny Hill in the 20th century. During Kearny's Fourth of July celebrations (which include a fireworks display), Bunnyland Hill is the primary gathering spot for celebrants and observers.
The largest park in Kearny is West Hudson Park, shared with Harrison, which contains a variety of sports fields, recreational areas, and an artificial pond. The next largest recreational zone is the Kearny Playground at Gunnel Oval.
The town is bordered by East Newark, Harrison and North Arlington. The Passaic River separates it from Newark and Belleville, and the Hackensack River separates it from Jersey City.
There were 13,539 households out of which 34.6% had children under the age of 18 living with them, 53.8% were married couples living together, 13.2% had a female householder with no husband present, and 27.6% were non-families. 21.8% of all households were made up of individuals and 8.8% had someone living alone who was 65 years of age or older. The average household size was 2.81 and the average family size was 3.28.
In the town the population was spread out with 21.5% under the age of 18, 10.7% from 18 to 24, 35.7% from 25 to 44, 21.3% from 45 to 64, and 10.9% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 106.6 males. For every 100 females age 18 and over, there were 107.0 males.
The median income for a household in the town was $97,757, and the median income for a family was $154,596. Males had a median income of $68,672 versus $50,620 for females. The per capita income for the town was $85,886. About 2.1% of families and 4.6% of the population were below the poverty line, including 3.1% of those under age 18 and 7.0% of those age 65 or over.
The Mayor and Council operate on a legislative basis, with the Mayor having veto power. The day-to-day operations fall within the jurisdiction of the Town Administrator whose duties are specified by local ordinance, and who generally carries out the policies adopted by the Mayor and Council.
The Mayor of Kearny is Alberto G. Santos, who has been Mayor of Kearny since January 1, 2000. Before his election as mayor, Santos served as councilman of Kearny's Second Ward for one year.
Members of the Town Council are:
The Belleville Turnpike (Route 7) forms the northern border of the town with North Arlington. Kearny Avenue passes through the town and continues north as Route 17. The Essex Freeway (I-280) passes through the boro and ends at Interstate 95(W)/New Jersey Turnpike at Exit 15W. A toll gate (the 15W toll gate) is located in Kearny, with a total of 14 lanes at the gate.
The closest airport with scheduled passenger service is Newark Liberty International Airport, located 6.5 miles away in Newark / Elizabeth.
In 1708, his friend Major Nathaniel Kingsland took over the upper western tract of the Grant. In 1710 he sold it for 300 English Pounds Sterling to Captain Arent Schuyler, a former Dutch trader and Indian Agent. The new purchase included present-day Kearny, North Arlington, Lyndhurst and Kingsland.
Shortly after Schuyler's purchase of his new homestead, a peculiar green stone was uncovered. It was sent to England for analysis and he learned that that it contained 80% copper. His opening of a copper mine brought the first steam engine to America from England; it was used to pump out the deep mine shaft. The engine was secretly delivered by its engineer, Josiah Hornblower. The engine and mines were destroyed by fire in 1772 and remained idle for some years.
Schuyler Mansion played a role during the American Revolutionary War Era. When Lord Howe of England took possession of New York Harbor, the nearness of Schuyler Mansion drew many of his officers. They generally traveled over a road that today is referred to as the Belleville Turnpike. It was originally made of cedar logs from the nearby swamps in 1759.
During September 1777, General Henry Clinton, head of the British Expeditionary Forces in America, selected Schuyler Mansion for his headquarters during one of his more important raiding operations which included the famed Battle of Second River. The Mansion stood until 1924, a period of 214 years, when it was torn down by a land development company.
In the middle 1800s, Kearny was the upper, or northern, section of the Township of Harrison. A prominent citizen and resident of the upper section, General N. M. Halsted, felt it was impossible under these political conditions for his section to obtain proper recognition. He engaged an energetic campaign for an independent township. He succeeded when the NJ Legislature of 1867 on March 14 th, adopted “an act creating the Township of Kearny”. The town was named to honor Major General Phil Kearny, Commander of the New Jersey Forces in the Civil War and the late resident of well-known “Belle Grove”, locally called Kearny Castle.
On April 8, 1867, the first election of town officers was held. Every office in the new Township had to be filled. General N. M. Halsted was elected Chairman. The first official seat of Government was three rooms in the old Lodi Hotel, on the northeast corner of Schuyler and Harrison Avenues.
In the early 1870s, Kearny erected its first Town Hall, on the corner of Kearny and Woodland Avenues, the present site of the Knox Presbyterian Church Parish Hall. This served as a Town Hall, Court House, and Schoolhouse. When the town's growth demanded larger quarters, the present Kearny Town Hall, built of Indiana Limestone, was erected in 1909. It is located in almost the exact center of own.
The Minute Book of the Township states on August 16, 1870, the first step toward establishing Kearny's present public school system was taken. The first schoolhouse was housed in the Town Hall built at Kearny and Woodland Avenues.
In 1876, the Mile End Thread Mills started operating, giving employment to several hundred operators.
In 1883, the Marshall Flax Spinning Company of England erected a large plant in Kearny, known as the Linen Thread Company. Their need for experienced flax spinners brought an influx of workers from other sections of the British Isles. Families of those early textile workers were the nucleus of Kearny's present population.
The Puraline Manufacturing Company, later called the Arlington Company, which became a subsidiary of E. I. DuPont de Nemours Company, had purchased a large tract of land east of the Arlington Station on the Erie Railroad extending well out, north of the railroad embankment, into the meadowland.
In 1887, Sir Michael Nairn established the Nairn Linoleum Company, now the Congoleum Nairn Company of Kearny, giving further impetus to local industrial growth.
In 1902, the Lovell-Dressel Company, manufacturers of marine and railway lamps and fixtures, located in Kearny adjacent to the Erie Railroad.
Other industries which located in Kearny include: Swift & Company, Koppers Company, Theobald Industries, Standard Tool & Manufacturing, Wilkata Box Company, Harris Steel Company and L & R Manufacturing. Between 1926 and 1986 the Kearny Works of Western Electric employed thousands in producing a variety of hardware and supplies for the Bell System and was the home of the "Kearny Standard" for tools and equipment.
Cargo ships were built at Kearny Yards during World War I, and warships during WWII.