Union County, New Jersey


Union County is a county in the northern-central part of the U.S. state of New Jersey. As of the 2020 United States census, the county was the state's seventh-most-populous county with a population of 575,345, its highest decennial count ever and an increase of 38,846 from the 2010 census count of 536,499. Its county seat is Elizabeth, which is also the most populous municipality in the county, with a 2020 census population of 137,298, and the largest by area, covering. The county is part of the Central Jersey region of the state.
In 2015, the county had a per capita personal income of $60,089, the seventh-highest in New Jersey and ranked 152nd of 3,113 counties in the United States. The Bureau of Economic Analysis ranked the county as having the 119th-highest per capita income of all 3,113 counties in the United States in 2009. A study by Forbes.com determined that Union County residents pay the second-highest property taxes of all U.S. counties, based on 2007 data.
With a population density of in 2000, Union County was the 15th-most densely populated county in the United States as of the 2010 Census, and third-densest in New Jersey, behind Hudson County and Essex County.

History

Etymology

Established in 1857 as the last county created in New Jersey, it was named after the Union threatened by slavery dispute during this period, which would erupt into civil war in 1861.

History

All of present-day Union County was part of the Elizabethtown Tract, which was purchased in 1664, by English colonists from the Lenape Native Americans that lived in the area of present-day Elizabeth, New Jersey. Union County was formed on March 19, 1857, from portions of Essex County; it was the last of New Jersey's 21 counties to be established.
Many historic places and structures are to be found in the county, including on the National Register of Historic Places listings in Union County, New Jersey.
In the fall, Union County holds its annual "Four Centuries in a Weekend" festival for the public, celebrating and touring historic buildings, museums and sites in the county.

Geography

According to the U.S. Census Bureau, as of the 2020 Census, the county had a total area of, of which was land and was water.
Much of Union County is relatively flat and low-lying. Only in the northwestern corner does any significant relief appear as the Watchung Mountains cross the county. It is there that highest elevations, two areas approximately above sea level, are found in Berkeley Heights. The lowest elevation is sea level along the eastern shore at the Arthur Kill.

Rivers, lakes and streams

Climate and weather

In recent years, average temperatures in the county seat of Elizabeth have ranged from a low of in January to a high of in July, although a record low of was recorded in February 1934 and a record high of was recorded in July 1993. Average monthly precipitation ranged from in February to in July. In Berkeley Heights average monthly temperatures range from 29.4 °F in January to 74.7 °F in July. The climate in the county is hot-summer humid continental in the west and humid subtropical in the east. The hardiness zone is 7a west of the Garden State Parkway and 7b to the east.

Demographics

Union County is ethnically diverse. Berkeley Heights, Clark, Roselle Park, Cranford, Kenilworth, Linden, New Providence, Scotch Plains, Springfield, Summit, Union and Westfield have high percentages of Italian American residents. Elizabeth, Plainfield, Rahway, Roselle and Union all have large African American communities. Roselle Park has a notably large Indian American community, while Roselle Park, Roselle, Linden, Rahway, Plainfield and particularly Elizabeth have fast-growing Hispanic and Portuguese populations.
The county's Jewish population was 35,000 as of 2004, with notable communities located in Cranford, Elizabeth, Hillside, Linden, Scotch Plains, Springfield, Union, and Westfield.

2020 census

As of the 2020 census, the county had a population of 575,345. The median age was 38.7 years. 23.4% of residents were under the age of 18 and 14.3% of residents were 65 years of age or older. For every 100 females there were 93.5 males, and for every 100 females age 18 and over there were 90.6 males age 18 and over.
The racial makeup of the county was 41.1% White, 20.4% Black or African American, 0.7% American Indian and Alaska Native, 5.6% Asian, <0.1% Native Hawaiian and Pacific Islander, 18.4% from some other race, and 13.8% from two or more races. Hispanic or Latino residents of any race comprised 34.0% of the population.
100.0% of residents lived in urban areas, while <0.1% lived in rural areas.
There were 200,372 households in the county, of which 37.0% had children under the age of 18 living in them. Of all households, 48.9% were married-couple households, 16.6% were households with a male householder and no spouse or partner present, and 28.5% were households with a female householder and no spouse or partner present. About 23.2% of all households were made up of individuals and 10.0% had someone living alone who was 65 years of age or older.
There were 209,908 housing units, of which 4.5% were vacant. Among occupied housing units, 56.4% were owner-occupied and 43.6% were renter-occupied. The homeowner vacancy rate was 1.4% and the rental vacancy rate was 4.0%.

2010 census

The 2010 United States census counted 536,499 people, 188,118 households, and 134,692 families in the county. The population density was. There were 199,489 housing units at an average density of. The racial makeup was 61.33% White, 22.05% Black or African American, 0.39% Native American, 4.63% Asian, 0.03% Pacific Islander, 8.48% from other races, and 3.09% from two or more races. Hispanic or Latino people of any race were 27.34% of the population.
Of the 188,118 households, 34.4% had children under the age of 18; 50.1% were married couples living together; 15.6% had a female householder with no husband present and 28.4% were non-families. Of all households, 23.6% were made up of individuals and 9.7% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.32.
24.5% of the population were under the age of 18, 8.6% from 18 to 24, 27.5% from 25 to 44, 26.8% from 45 to 64, and 12.6% who were 65 years of age or older. The median age was 38 years. For every 100 females, the population had 94 males. For every 100 females ages 18 and older there were 90.7 males.

Government

County government

Union County is governed by a nine-member Board of County Commissioners. The members are elected at-large in partisan elections to serve three-year terms on a staggered basis, with three seats coming up for election each year. The board sets policies for the operation of the county. The Commissioners perform the county's legislative and executive functions. In their legislative role, they formulate and adopt a budget and set county policies and procedures. In their executive role, they oversee county spending and functioning. Many of the administrative duties are delegated by the Board of County Commissioners to the County Manager. Each of the commissioners serves on various committees and boards as a part of their duties. These include committees on Economic Development, Parks and Recreation, and Public Works and Policy. In addition, the board oversees the county's Open Space Trust Fund. Day-to-day operation of the county and its departments is supervised by an appointed County Manager, Edward Oatman. In 2016, freeholders were paid $30,692, while the Freeholder vice chairman received $31,732 and the Freeholder chairman had an annual salary of $32,773. The County Manager is Edward Oatman. No Republican has been elected to countywide office since 1995.
Union County is governed by a Board of County Commissioners, whose nine members are elected at-large to three-year terms of office on a staggered basis with three seats coming up for election each year, with an appointed County Manager overseeing the day-to-day operations of the county. At an annual reorganization meeting held in the beginning of January, the board selects a chair and vice chair from among its members., Union County's County Commissioners are :
CommissionerParty, residence, term
Chair Kimberly Palmieri-MoudedD, Westfield, 2027
Vice Chair Lourdes M. LeonD, Elizabeth, 2026
James E. Baker Jr.D, Rahway, 2027
Joseph BodekD, Linden, 2026
Michele DelisfortD, Union Township, 2026
Sergio GranadosD, Elizabeth, 2025
Bette Jane KowalskiD, Cranford, 2025
Alexander MirabellaD, Fanwood, 2027
Rebecca WilliamsD, Plainfield, 2025

Constitutional officers elected on a countywide basis are:
OfficeParty, residence, term
County Clerk Joanne RajoppiD, Westfield, 2025
Sheriff Peter CorvelliD, Kenilworth, 2026
Surrogate Christopher E. HudakD, Clark, 2027

Union County constitutes Vicinage 12 of the New Jersey Superior Court and is seated at the Union County Courthouse in Elizabeth, with additional facilities also located in Elizabeth; the Assignment Judge for Vicinage 12 is Karen M. Cassidy. Law enforcement at the county level includes the Union County Police Department, the Union County Sheriff's Office, and the Union County Prosecutor's Office. Union County's Acting Prosecutor is Michael A. Monahan.

Notable events in county government

In 2023, Union County agreed to honor the site in North Jersey of what local activists described as the public execution by burning at the stake of three enslaved New Jerseyans in 1741. In 2023, the county worked to revise its logo, which has had what has been described as the only county seal in the nation that depicts a woman being killed. The logo depicted Hannah Caldwell being shot by a British light infantryman during the Battle of Connecticut Farms. In 2023, Union County moved to revise its county seal, asking residents to participate in an online poll to choose between two alternatives, both of which eliminate the depiction of Caldwell's death. In 2022, controversy erupted over the county's deletion of negative social media comments made about the opening of Tëmike Park, an LGBTQ-inclusive playground, in Cedar Brook Park. In 2022, a state court found the county illegally circumvented the public bidding process in awarding contracts for the construction of a proposed Union County government building in Elizabeth.
In 2015, the county was forced to pay legal fees after losing a trademark claim it brought against a frequent county government critic who used the County of Union seal on her blog. In 2011, an investigation found mismanagement of county funds in association with MusicFest, a free annual concert. In 2009, following a First Amendment challenge by the American Civil Liberties Union, the county commissioners agreed to issue a public apology for cutting off speech by a resident who was addressing the board about possible nepotism on the county payroll.

Federal representatives

Four Congressional Districts cover the county, including portions of the 7th, 8th, 10th and 12th districts.

State representatives

The 21 municipalities of Union County are represented by four legislative districts.
DistrictSenatorAssemblyMunicipalities
20thJoseph Cryan (D)Reginald Atkins
Annette Quijano
Elizabeth, Kenilworth, Roselle, and Union Township.
21stJon Bramnick (R)Michele Matsikoudis
Nancy Munoz
Berkeley Heights, Garwood, Mountainside, New Providence, Springfield Township, Summit, and Westfield. The remainder of this district covers portions of Morris County, Middlesex County, and Somerset County.
22ndNicholas Scutari James J. Kennedy
Linda S. Carter
Clark, Cranford, Fanwood, Linden, Plainfield, Rahway, Roselle Park, Scotch Plains, and Winfield. The remainder of this district covers portions of Somerset County.
28thRenee Burgess Garnet Hall
Cleopatra Tucker
Hillside. The remainder of this district covers portions of Essex County.

Law enforcement

The Union County Sheriff's Office is located in Elizabeth, New Jersey. It is currently headed by Peter Corvelli. It was headed by Ralph Froehlich, a Union resident who was first elected in 1977 and served in office for 37 years, making him the longest-serving Sheriff in New Jersey history. There are two top deputies, known as undersheriffs, and they are Dennis Burke and Amilcar Colon. A 1981 investigation of the Union County Jail reviewed issues relating to overcrowding, escapes, escape attempts and suicides in the detention facility.
On July 1, 2021, the Sheriff's Office regained control of the Union County Jail and made it a division within the organization; the Division of Corrections. The New Jersey State Policemen's Benevolent Association Local 108 is the official labor union and the collective bargaining agent for the Sheriff's Officers of Union County. This body is subdivided into Local 108 for the line officers and Local 108A for the supervisors.
The Union County Police Department operates independently of the Sheriff's office. The Union County Police Department originally began as the Union County Park Police. The Union County Police are tasked with patrolling Union County's properties. They also supplement the local municipalities with police presence and patrol when requested. Martin Mogensen has been the Chief of Police since February 2023.
The Union County Police have several divisions and are relied upon for their multiple services. Currently assigned are Patrol, Detective Bureau, Emergency Services Unit, and the Marine Unit. Union County Regional 911 and Dispatch is one of the many services that the County Police provide. They are the primary PSAP for multiple municipalities, provide police/fire/EMS dispatch, dispatch medics, and Union County Fire Mutual Aid. The PD belongs to the New Jersey State Policemen's Benevolent Association, Local 73.

Politics

Union County is a strongly Democratic county. In the 2020 election, Democrat Joe Biden received the highest share of the vote for a Democrat in the county's history. As of October 1, 2021, there were a total of 362,501 registered voters in Union County, of whom 178,449 were registered as Democrats, 57,878 were registered as Republicans and 121,478 were registered as unaffiliated. There were 4,696 voters registered to other parties. Among the county's 2010 Census population, 53.3% were registered to vote, including 70.6% of those ages 18 and over.

Education

Tertiary education

Kean University, a co-educational, public research university dating back to 1855 is located in Union and Hillside, serving nearly 13,000 undergraduates. Kean University educates its students in the liberal arts, the sciences and the professions; it is best known for its programs in the humanities and social sciences and in education, graduating the most teachers in the state of New Jersey annually, along with a physical therapy program which it holds in conjunction with the University of Medicine and Dentistry of New Jersey.
Union College is the two-year community college for Union County, one of a network of 19 county colleges in New Jersey. Union College was founded in 1933 as Union County College and has campuses in Cranford, Elizabeth, Plainfield and Scotch Plains.

School districts

Most municipalities have their own public high schools, exceptions being Garwood, whose students attend Arthur L. Johnson High School in Clark; Winfield, whose students attend David Brearley High School in Kenilworth; and Mountainside, whose students attend Governor Livingston High School in Berkeley Heights. Fanwood is mostly merged with Scotch Plains educationally and the two towns have one high school.
The county has the following school districts:
;K-12:
;Elementary
The county also has Union County Vocational Technical Schools, which has both full-time magnet programs that students must apply to, and split-time vocational programs.

Economy

The Bureau of Economic Analysis calculated that the county's gross domestic product was $34.4 billion in 2021, which was ranked eighth in the state and was a 2.4% increase from the prior year.
The top employers in 2011, according to the Union County Economic Development Corporation, were:
#Employer# of employees
1Merck & Co.10,000
2New England Motor Freight3,900
3USI Services Group3,200
4Overlook Medical Center2,961
5Maher Terminals1,700
6Trinitas Hospital1,674
7Children's Specialized Hospital1,440
8Alcatel-Lucent1,300
9ConocoPhillips1,000

Transportation

The county is served by rail, air, highways and ports.

Roads and highways

, the county had a total of of roadways, of which were maintained by the local municipality, by Union County and by the New Jersey Department of Transportation, by the New Jersey Turnpike Authority and by the Port Authority of New York and New Jersey.
Major highways which traverse the county include the New Jersey Turnpike, the Garden State Parkway, I-78, I-278, Route 1/9, Route 22, Route 24, Route 27, Route 28, Route 35, Route 82, Route 124, Route 439, and the Goethals Bridge. At 0.15 miles, Route 59, located entirely in Union County, is the shortest state highway in New Jersey.

Public transportation

Passenger rail service is provide by NJ Transit via the Northeast Corridor, North Jersey Coast Line, Raritan Valley Line, the Morristown Line and the Gladstone Branch. Freight service is provided by on Conrail's Lehigh Line and Chemical Coast Branch. Freight and passenger rail service was provided by the Rahway Valley Railroad from 1897 until 1992 when the short line closed due to lack of customers.
NJ Transit provides bus service to the Port Authority Bus Terminal in Midtown Manhattan, as well as service to major cities in New Jersey and within Union County.
The Port Newark-Elizabeth Marine Terminal is part of the Port Authority of New York and New Jersey.
The southern portion of Newark Liberty International Airport is located in Elizabeth, within Union County.

Potential rail-to-trails

Union County Park Line rail trail is a proposed walking and/or biking trail proposed on old railroad tracks. Two abandoned rails exist in the county.
The City of Summit and the Summit Park Line Foundation are working on turning the line from Morris Avenue to Briant Park in Summit into a that will be approximately one mile long. This rail trail, potentially called the Summit Park Line, could provide a greenway to connect several county parks, akin to a Summit High Line. A path could run directly from Summit to the Arthur Kill in Linden, New Jersey on the Rahway Valley Railroad and the Staten Island Rapid Transit line.
The Summit city council applied for a $1 million grant toward the Summit Park Line project in November 2016. "If Summit is able to complete the project, it might help other parts of the greenway come through," said Union County Public Relations Coordinator, Sebastian Delia.
The Rahway Valley Railroad runs from Summit to Roselle Park. Beginning in Hidden Valley Park, the railroad right-of-way continues by connecting Houdaille Quarry, Briant Park, Meisel Park, Rahway River Parkway, Galloping Hill Golf Course and Black Brook Park. The ending of the railway is on Westfield Avenue in Roselle Park. The Staten Island Rapid Transit runs from Cranford to Staten Island, although the project would only include the section that runs from Cranford to Linden. The possible inception in Cranford would be a lot on South Avenue East. The ending of this trail would be in Linden at an empty lot. A boardwalk would run over the existing tracks to ease line reactivation.

Municipalities

The 21 municipalities in Union County are:
Municipality
Map keyMunicipal
type
PopulationHousing
units
Total
area
Water
area
Land
area
Pop.
density
Housing
density
School districtCommunities
Berkeley Heights21township13,2854,5966.270.056.212,122.4739.9Berkeley HeightsMurray Hill
Clark14township15,5445,7514.490.194.303,430.51,337.0Clark
Cranford16township23,8478,8164.870.044.834,684.61,825.4Cranford TownshipCranford CDP
Elizabeth11city137,29845,51613.461.1512.3210,144.13,694.7Elizabeth
Fanwood6borough7,7742,6861.340.001.345,454.12,001.9Scotch Plains-Fanwood
Garwood5borough4,4541,8700.660.000.666,362.72,815.5Clark
Garwood
Hillside19township22,4567,5362.760.012.757,784.02,740.6Hillside
Kenilworth8borough8,4272,9242.160.002.163,668.31,355.3KenilworthKean University CDP
Linden12city43,73815,87211.410.7310.683,793.81,486.8Linden
Mountainside3borough7,0202,5584.050.044.011,668.0638.3Berkeley Heights
Mountainside
New Providence2borough13,6504,5373.660.023.643,343.41,246.3New ProvidenceMurray Hill
Plainfield7city54,58616,6216.030.016.028,270.12,759.8Plainfield
Rahway13city29,55611,3004.030.133.907,016.82,899.5Rahway
Roselle10borough22,6957,9392.660.012.657,953.52,994.7Roselle
Roselle Park9borough13,9675,2311.230.001.2310,792.74,245.8Roselle Park
Scotch Plains20township24,9688,8969.050.039.022,606.9986.4Scotch Plains-Fanwood
Springfield17township17,1786,7365.190.025.173,057.21,302.0SpringfieldSpringfield CDP
Summit1city22,7198,1906.050.056.003,578.91,366.0Summit
Union18township59,72820,2509.090.029.076,244.32,232.4UnionConnecticut Farms CDP
Kean University CDP
Union CDP
Vauxhall CDP
Westfield4town31,03210,9506.740.026.724,512.21,629.8Westfield
Winfield15township1,4237140.180.000.188,320.14,038.5Kenilworth
Winfield Township
Union Countycounty575,345199,489105.402.55102.855,216.11,939.5--

Parks and recreation

County parks are maintained and operated by the Union County Department of Parks and Recreation, the successor agency to the Union County Park Commission.

County-run parks

  • Ash Brook Reservation, Scotch Plains
  • Black Brook Park, Kenilworth
  • Briant Park, Summit
  • Brookside Park, Scotch Plains
  • Cedar Brook Park, Plainfield
  • *Home to the Shakespeare Garden.
  • Echo Lake Park, Westfield and Mountainside
  • *The privately owned Echo Lake Country Club donated the parkland for this park in the 1920s. The name arises from the echo heard off the high bluff on the far side of the lake. Echo Lake itself was created by damning when mills were established on Nomahegan Brook, a tributary of the Rahway River. The Great Minisink Trail passed by Echo Lake Park.
  • Elizabeth River Parkway
  • Esposito Park, Clark
  • *Features a 1/2-mile path with exercise equipment and a skate park
  • Green Brook Park, Plainfield
  • Hidden Valley Park, Springfield and Summit
  • *Eastern border is adjacent to the now-closed Houdaille Quarry.
  • Houdaille Quarry, Springfield
  • Kawameeh Park, Union
  • Lenape Park, Cranford, Westfield, and Kenilworth
  • *In the 1930s, workers digging Lenape Lake found mastodon bones here.
  • Madison Avenue Park, Rahway
  • *Adjacent to Rahway 7th and 8th Grade Academy
  • Clark Reservoir Recreation Area
  • Mattano Park, Elizabeth
  • *Named for a Lenape tribal leader, whose name was recorded by colonists as Mattano. In 1664, a group called the Elizabethtown Associates bought land in the Union County area from Mattano and another Lenape leader named Warinanco.
  • McConnell Park, Cranford
  • *Named for the first town doctor in Cranford
  • Milton Lake Park, Clark and Rahway
  • Mindowaskin Park, Westfield
  • Nomahegan Park, Cranford
  • * Contains Nomahegan Park Pond and encircles the Rahway River.
  • Oak Ridge Park, Clark
  • Passaic River Parkway, Berkeley Heights, New Providence, and Summit
  • Phil Rizzuto Park, Elizabeth
  • Ponderosa Farm Park, Scotch Plains
  • Rahway River Park, Rahway
  • *Environmental groups protested at the building of a stadium here in 2016. The movement gave birth to Friends of Rahway River Parkway.
  • Rahway River Parkway
  • Snyder Avenue Park, Berkeley Heights
  • Sperry Park, Cranford
  • Stanley Avenue Park, Summit
  • Tamaques Park, Scotch Plains
  • Unami Park, Cranford, Garwood, and Westfield
  • Washington Avenue Park, Springfield
  • Watchung Reservation, Mountainside and Scotch Plains
  • Warinanco Park, Elizabeth and Roselle
  • *Named for the Native American known as "Warinanco." Designed by the Olmsted Brothers firm.
  • Wheeler Park, Linden

Other notable parks

Parks that are not managed by the county government include:

Rahway River Parkway

The Rahway River Parkway is a greenway of parkland that hugs the Rahway River and its tributaries, such as Nomahegan Brook. It was the inaugural project of the Union County Parks Commission designed in the 1920s by the Olmsted Brothers firm, who were the sons of landscape architect Frederick Law Olmsted. Several county and municipal parks run along the Rahway River.

Elizabeth River Parkway

The Elizabeth River Parkway is a greenway of parkland alongside the Elizabeth River and its tributaries. It runs through Kean University and Liberty Hall Museum on the river's way to the Arthur Kill. The Elizabeth River Parkway is broken down into separate sections.
  • Chatfield/Zimmerman - Hillside and Union Township
  • Lightning Brook - Hillside and Union
  • Pruden/Pearl Oval - Elizabeth
  • Salem/Rutgers/Liberty - Hillside and Union
  • Woodruff/Conant Street - Hillside and Union
  • Ursino - Hillside and Union Township

Public golf courses

Union County's Division of Golf Operations runs two golf courses, which offer golf lessons and practice areas.
Another notable course
  • Shady Rest Country Club in Scotch Plains is recognized as the first African-American owned and operated golf clubhouse in the United States. As such, Shady Rest is the home course of the first African-American golf professional to play in the U.S. Open, John Matthew Shippen, Jr., who is considered a pioneer of the sport. Originally a private club and center for African-American social life, the township acquired and renamed it in the 1930s as the 'Scotch Hills Country Club' and made it open to the public. The history and significance of the course and clubhouse has not always been promoted as a place of national historic interest. Thankfully, the National Park Service has listed the Shady Rest Golf and Country Club in the National Registry of Historic Places, in large part due to the efforts of the Preserve Shady Rest Committee. The committee continues working to further solidify Shady Rest as a local, state, and national landmark given its historical significance.

Private golf courses

Other recreational facilities

Arts and culture

  • The Union County Performing Arts Center, located in the Rahway Arts District, offers professional productions in music and theater as well as training in the performing arts.
  • Kean Stage is the professional performing arts arm of Kean University. It is home to Wilkins Theatre on the Kean Main Campus in Union, Enlow Recital Hall directly across the Elizabeth River in East Campus in Hillside, as well as Premiere Stages, the professional equity theater company in residence at Kean University.
  • The Cranford Dramatic Club is New Jersey's oldest continually producing theater and has been putting on theatrical productions since its establishment in 1919.
  • Tomasulo Art Gallery is in the MacKay Library at Union County College's Cranford campus.
  • The Wharton Institute for the Performing Arts, located in Berkeley Heights and New Providence, is a center for music training and other training in performing arts, particularly aimed at children. It consists of the Performing Arts School, New Jersey Youth Symphony, and Paterson Music Project.
  • The Plainfield Symphony Orchestra was founded in 1919, making it the state's oldest community orchestra.
  • The duCret School of Art in Plainfield was founded in 1926.
  • The Swain Gallery, in Plainfield, was founded in 1868 and is the oldest privately owned art gallery in the state.

Union County Historical Society

In 1869, the Union County Historical Society of New Jersey was incorporated. The society meets at the Hanson House in Cranford.

Municipal historical societies

  • Berkeley Heights - The Berkeley Heights Historical Society.
  • Clark - The Clark Historical Society was founded in 1970. It operates the Dr. William Robinson Plantation House Museum, built in 1690 by a doctor from Scotland.
  • Cranford - The Cranford Historic Preservation Advisory Board is an official township committee body, while the Cranford Historical Society itself is citizen-run. It is located in the Hanson House in Hanson Park on Springfield Avenue and maintains the Crane-Phillips House a couple of blocks south on North Union Avenue as a museum.
  • Garwood - Garwood Historical Committee.
  • Hillside - The Hillside Historical Society, founded in 1975, meets at the Woodruff House.
  • Kenilworth - The Kenilworth Historical Society dates to 1974. It runs the Oswald J. Nitschke House.
  • Linden - The Linden Society for Historical Preservation is an offshoot of an official cultural board in the city.
  • Mountainside - The Mountainside Restoration Committee, Inc. is also called the Mountainside Historic Committee, founded in 1984.
  • Plainfield - The Historical Society of Plainfield is headquartered at the Nathaniel Drake House Museum, built in 1746 on the Old York Road.
  • Rahway - The Rahway Historical Society is now called the Merchants' and Drovers' Tavern Museum Association.
  • Scotch Plains and Fanwood - The Scotch Plains-Fanwood Historical Society runs the Osborn Cannonball House.
  • Springfield - The Historic Cannon Ball House serves as the home of the Springfield Historical Society.
  • Westfield - The Westfield Historical Society is in the Reeve History & Cultural Resource Center, a structure from the 1870s. The Society also runs the Miller-Cory House Museum, in a home that dates back to the 1740s.
  • Union - Union Township Historical Society is located in the 1782 historic Caldwell Parsonage. The Society's mission is to preserve and promote the rich and diverse history of the Township of Union.

Other historical preservation groups

  • Friends of Rahway River Parkway is dedicated to preserving Olmsted design principles and features of county parkland along the Rahway River as it flows to the Arthur Kill.

Sister city

The county has a sister city relationship with Wenzhou in Zhejiang, China.