About Washington Township, NJ

washington township NJ map
Written by NJroute22

About Washington Township, NJ

Another township/borough issue going on with Washington. Well, for starters, the Washington Township in Warren County is one of FIVE Washington Townships in New Jersey. If he wasn’t our first President, we wouldn’t be running into these problems!

Plus – there is a Washington (Borough) smack dab in the middle (surrounded by) Washington Township. Unnecessarily complicated, IMO.

Anyway, we include Washington Township as a northern anchor to our Route 31 offshoot. Some useful places to visit – and Route 57, which cuts through, is a somewhat convenient link between the Phillipsburg area and the Hackettstown region.

Washington Township, Warren County, New Jersey

Washington Township is a township in Warren CountyNew Jersey, United States. As of the 2010 United States Census, the township’s population was 6,651, reflecting an increase of 403 (+6.5%) from the 6,248 counted in the 2000 Census, which had in turn increased by 881 (+16.4%) from the 5,367 counted in the 1990 Census. It is part of the eastern most region of the Lehigh Valley. It is one of six municipalities in New Jersey under the name Washington (one of which is a borough, five of which are townships). Washington Township, Warren County completely surrounds the borough of Washington. Mansfield Township, also in Warren County, borders both this municipality and another Washington Township in Morris County.

Washington Township was incorporated as a township by an act of the New Jersey Legislature on April 9, 1849, from portions of Mansfield Township. Portions of the township were taken on February 20, 1868, to create Washington Borough. The township was named for George Washington, one of more than ten communities statewide named for the first president. It is one of five municipalities in the state of New Jersey with the name “Washington Township“. Another municipality, Washington Borough, is completely surrounded by Washington Township.


According to the United States Census Bureau, the township had a total area of 17.751 square miles (45.975 km), including 17.662 square miles (45.745 km) of land and 0.089 square miles (0.230 km) of water (0.50%). The Borough of Washington is an independent incorporated area surrounded by Washington Township.

Brass Castle (with a 2010 Census population of 1,555) and Port Colden (2010 population of 122) are unincorporated communities and census-designated places (CDPs) located within the township.

Other unincorporated communities, localities and place names located partially or completely within the township include Butlers Park, Changewater, Fort Golden and Pleasant Valley.


Historical population
Census Pop.
1850 1,567
1860 2,634 68.1%
1870 2,160 * −18.0%
1880 1,452 −32.8%
1890 1,304 −10.2%
1900 1,249 −4.2%
1910 1,023 −18.1%
1920 1,004 −1.9%
1930 1,007 0.3%
1940 1,320 31.1%
1950 1,765 33.7%
1960 3,055 73.1%
1970 3,585 17.3%
1980 4,243 18.4%
1990 5,367 26.5%
2000 6,248 16.4%
2010 6,651 6.5%
Est. 2014 6,482 −2.5%
* = Lost territory in previous decade

The Township’s economic data (as is all of Warren County) is calculated by the US Census Bureau as part of the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area.

Census 2010

At the 2010 United States Census, there were 6,651 people, 2,380 households, and 1,899 families residing in the township. The population density was 376.6 per square mile (145.4/km). There were 2,493 housing units at an average density of 141.1 per square mile (54.5/km). The racial makeup of the township was 93.46% (6,216) White, 2.50% (166) Black or African American, 0.24% (16) Native American, 1.91% (127) Asian, 0.00% (0) Pacific Islander, 0.65% (43) from other races, and 1.25% (83) from two or more racesHispanics or Latinos of any race were 4.39% (292) of the population.

There were 2,380 households, of which 35.0% had children under the age of 18 living with them, 69.0% were married couples living together, 7.6% had a female householder with no husband present, and 20.2% were non-families. 16.5% of all households were made up of individuals, and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.79 and the average family size was 3.14.

In the township, 24.8% of the population were under the age of 18, 7.1% from 18 to 24, 22.5% from 25 to 44, 32.6% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 42.2 years. For every 100 females there were 94.4 males. For every 100 females age 18 and over, there were 93.2 males. The Census Bureau’s 2006-2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $91,893 (with a margin of error of +/- $5,743) and the median family income was $99,332 (+/- $12,641). Males had a median income of $78,417 (+/- $14,664) versus $51,186 (+/- $17,904) for females. The per capita income for the borough was $39,873 (+/- $3,286). About 2.9% of families and 5.5% of the population were below the poverty line, including 6.8% of those under age 18 and 6.9% of those age 65 or over.


As of May 2010, the township had a total of 65.77 miles (105.85 km) of roadways, of which 35.61 miles (57.31 km) were maintained by the municipality, 22.92 miles (36.89 km) by Warren County and 7.24 miles (11.65 km) by the New Jersey Department of Transportation.

Notable people

People who were born in, residents of, or otherwise closely associated with Washington Township include:

washington township NJ map

About the author


NJroute22 (site admin) is an avid traveler along NJ Route 22 (and almost all of central New Jersey!) Family man, pet lover, and property owner who has a natural curiosity for everything around.