Warren Township is a township in Somerset County, in the U.S. state of New Jersey. The township is a bedroom suburb of New York City in the much larger New York metropolitan area, located within the Raritan Valley region. As of the 2020 United States census, the township's population was 15,923, an increase of 612 (+4.0%) from the 2010 census count of 15,311, which in turn reflected an increase of 1,052 (+7.4%) from the 14,259 counted in the 2000 census.Table 7. Population for the Counties and Municipalities in New Jersey: 1990, 2000 and 2010, New Jersey Department of Labor and Workforce Development, February 2011. Accessed May 1, 2023. Warren is situated in northeastern Somerset County bordering both Morris (along the Passaic River) and Union counties.

The township has been one of the state's highest-income communities. Based on data from the American Community Survey for 2013–2017, Warren Township residents had a median household income of $154,647, ranked 12th in the state among municipalities with more than 10,000 residents, more than double the statewide median of $76,475.Raychaudhuri, Disha. "The wealthiest towns in N.J., ranked", NJ Advance Media for NJ.com, June 7, 2019. Accessed November 4, 2019. "The median household income in N.J. is $76,475, recent Census data shows.... A note about the data: The data comes from 2013-2017 American Community Survey conducted by U.S. Census Bureau. Smaller towns with less than 10,000 residents were excluded from the list.... 12. Warren, Somerset County Median income: $154,647"

In 2012, Forbes.com listed Warren as 334th in its listing of "America's Most Expensive ZIP Codes", with a median home price of $842,750.Brennan, Morgan. "America's Most Expensive ZIP Codes 2012", Forbes, October 16, 2012. Accessed February 18, 2020.

History Warren was originally inhabited by the Lenape Native Americans and was colonized in the 1720s by European farmers. As early as 1900, it became a destination for wealthy residents looking to escape nearby New York City.A Brief History of Warren Township, Warren Township. Accessed March 19, 2007. Warren was incorporated as a township by an act of the New Jersey Legislature on March 5, 1806, from portions of Bernards Township and Bridgewater Township. The south-eastern half of the original township (which was close to a railroad and contained most of the population) was separated off as North Plainfield Township (since renamed to Green Brook Township) on April 2, 1872.Snyder, John P. The Story of New Jersey's Civil Boundaries: 1606–1968, Bureau of Geology and Topography; Trenton, New Jersey; 1969. p. 155. Accessed May 30, 2024.

Warren was named for Revolutionary War patriot, General Joseph Warren, who was killed at the Battle of Bunker Hill.Hutchinson, Viola L. The Origin of New Jersey Place Names, New Jersey Public Library Commission, May 1945. Accessed August 21, 2015.Gannett, Henry. The Origin of Certain Place Names in the United States, p. 315. United States Government Printing Office, 1905. Accessed August 21, 2015. The township celebrated its 200th anniversary in 2006.

The Historical Sites Committee was formed in 1971 and members are appointed by the governing body to administer municipally owned historic landmarks. The historical landmarks they have protected are the Mount Bethel Baptist Meetinghouse, the Baker–Duderstadt Farm, the Kirch–Ford House, and two small family cemeteries. The Meetinghouse, Baker-Duderstadt Farm, and the Kirch–Ford House are listed on the National Register of Historic Places.New Jersey and National Registers of Historic Places: Somerset County, New Jersey Department of Environmental Protection Historic Preservation Office, updated January 2, 2026. Accessed January 12, 2026.

Geography According to the United States Census Bureau, the township had a total area of 19.64 square miles (50.86 km2), including 19.57 square miles (50.68 km2) of land and 0.07 square miles (0.18 km2) of water (0.36%).

Unincorporated communities, localities and place names located partially or completely within the township include Coontown, Dock Watch Hollow, Gallia, Mount Bethel, Round Top, Smalleytown, Springdale, Union Village, and Warrenville.Locality Search, State of New Jersey. Accessed May 21, 2015.

The township borders Bernards Township to the north and west, Bridgewater Township to the southwest, Green Brook Township to the southeast, and Watchung to the east; all of which lie within Somerset County. Northeastern borders are the communities of Long Hill in Morris County and Berkeley Heights in Union County.Areas touching Warren Township, MapIt. Accessed March 8, 2020.Municipalities, Somerset County, New Jersey. Accessed March 8, 2020.New Jersey Municipal Boundaries, New Jersey Department of Transportation. Accessed November 15, 2019.

The east–west Second Watchung Mountain ridge bisects Warren, with the northern half of the township sloping northward to the Passaic River and Dead River, and the southern half spanning the Washington Valley, between the First and Second Watchung Mountain ridges, through which runs the East Branch of the Middle Brook. At the border with Bridgewater Township, the Second Watchung Mountain features a prominent cliff face at the now-abandoned Dock Watch Quarry.

As of 2026, the township is a member of Local Leaders for Responsible Planning in order to address the township's Mount Laurel doctrine-based housing obligations.

Demographics

2020 census +Warren Township, Somerset County, New Jersey – Racial and ethnic composition Race / Ethnicity (NH = Non-Hispanic)Pop 2000Pop 2010% 2000% 2010White alone (NH)11,91811,70410,56983.58%76.44%66.38%Black or African American alone (NH)1692252771.19%1.47%1.74%Native American or Alaska Native alone (NH)1660.01%0.04%0.04%Asian alone (NH)1,5202,3043,24910.66%15.05%20.40%Native Hawaiian or Pacific Islander alone (NH)5340.04%0.02%0.03%Other race alone (NH)2224950.15%0.16%0.60%Mixed race or Multiracial (NH)1692255671.19%1.47%3.56%Hispanic or Latino (any race)4558201,1563.19%5.36%7.26%Total14,25915,31115,923100.00%100.00%100.00%

2010 census The 2010 United States census counted 15,311 people, 5,059 households, and 4,285 families in the township. The population density was 782.5 per square mile (302.1/km2). There were 5,258 housing units at an average density of 268.7 per square mile (103.7/km2). The racial makeup was 80.94% (12,392) White, 1.52% (233) Black or African American, 0.05% (7) Native American, 15.07% (2,307) Asian, 0.10% (15) Pacific Islander, 0.64% (98) from other races, and 1.69% (259) from two or more races. Hispanic or Latino of any race were 5.36% (820) of the population.

Of the 5,059 households, 42.7% had children under the age of 18; 75.8% were married couples living together; 6.6% had a female householder with no husband present and 15.3% were non-families. Of all households, 12.7% were made up of individuals and 6.4% had someone living alone who was 65 years of age or older. The average household size was 3.01 and the average family size was 3.30.

27.8% of the population were under the age of 18, 5.9% from 18 to 24, 18.5% from 25 to 44, 34.4% from 45 to 64, and 13.4% who were 65 years of age or older. The median age was 43.8 years. For every 100 females, the population had 95.5 males. For every 100 females ages 18 and older there were 94.1 males.

The Census Bureau's 2006–2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $135,143 (with a margin of error of +/− $23,156) and the median family income was $162,083 (+/− $17,221). Males had a median income of $115,875 (+/− $15,861) versus $68,450 (+/− $13,300) for females. The per capita income for the township was $71,469 (+/− $6,664). About 0.8% of families and 0.9% of the population were below the poverty line, including 0.8% of those under age 18 and none of those age 65 or over.DP03: Selected Economic Characteristics from the 2006–2010 American Community Survey 5-Year Estimates for Warren township, Somerset County, New Jersey , United States Census Bureau. Accessed May 21, 2012.

2000 census As of the 2000 United States census there were 14,259 people, 4,629 households, and 3,939 families residing in the township. The population density was . There were 4,718 housing units at an average density of . The racial makeup of the township was 86.28% White, 1.26% African American, 0.04% Native American, 10.67% Asian, 0.06% Pacific Islander, 0.41% from other races, and 1.28% from two or more races. Hispanic or Latino of any race were 3.19% of the population.Census 2000 Profiles of Demographic / Social / Economic / Housing Characteristics for Warren township, Somerset County, New Jersey , United States Census Bureau. Accessed February 14, 2013.DP-1: Profile of General Demographic Characteristics: 2000 – Census 2000 Summary File 1 (SF 1) 100-Percent Data for Warren township, Somerset County, New Jersey , United States Census Bureau. Accessed February 14, 2013.

There were 4,629 households, out of which 45.3% had children under the age of 18 living with them, 78.3% were married couples living together, 4.8% had a female householder with no husband present, and 14.9% were non-families. 12.2% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older. The average household size was 3.05 and the average family size was 3.33.

In the township the population was spread out, with 29.7% under the age of 18, 4.6% from 18 to 24, 27.5% from 25 to 44, 27.0% from 45 to 64, and 11.2% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 99.1 males. For every 100 females age 18 and over, there were 95.6 males.

The median income for a household in the township was $103,677, and the median income for a family was $121,264. Males had a median income of $80,231 versus $46,356 for females. The per capita income for the township was $49,475. About 0.7% of families and 2.1% of the population were below the poverty line, including 1.4% of those under age 18 and 1.5% of those age 65 or over.

Economy The insurance company Chubb is based in Warren.Contact Us, Chubb Corp. Accessed February 14, 2013.

Arts and culture Until 2017, the Serbian Orthodox Eparchy of Eastern America was headquartered in Warren Township."Contact." Serbian Orthodox Eparchy of Eastern America. Accessed July 25, 2017. "Serbian Orthodox Diocese of Eastern America 9 Friar Tuck Ct Warren, NJ 07059"

Parks and recreation Wagner Farm Arboretum, which consists of was the former Wagner Dairy Farm acquired by the township in 2001.History, Wagner Farm Arboretum. Accessed February 14, 2013. "On May 31, 2001, Warren Township purchased the Wagner Farm property for the purpose of preserving it as open space."

Government

Local government