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Knowlton Township, New Jersey
Township
An old barn in Knowlton Township, February 2008
An old barn in Knowlton Township, February 2008
Official seal of Knowlton Township, New Jersey
Seal
Location of Knowlton Township in Warren County highlighted in yellow (right). Inset map: Location of Warren County in New Jersey highlighted in black (left).
Location of Knowlton Township in Warren County highlighted in yellow (right). Inset map: Location of Warren County in New Jersey highlighted in black (left).
Census Bureau map of Knowlton Township, New Jersey
Census Bureau map of Knowlton Township, New Jersey
Knowlton Township, New Jersey is located in Warren County, New Jersey
Knowlton Township, New Jersey
Knowlton Township, New Jersey
Location in Warren County, New Jersey
Knowlton Township, New Jersey is located in New Jersey
Knowlton Township, New Jersey
Knowlton Township, New Jersey
Location in New Jersey
Knowlton Township, New Jersey is located in the United States
Knowlton Township, New Jersey
Knowlton Township, New Jersey
Location in the United States
Country  United States
State  New Jersey
County Warren
Royal charter February 23, 1763
Incorporated February 21, 1798
Named for Thomas Knowlton or "knoll town"
Government
 • Type Township
 • Body Township Committee
Area
 • Total 25.33 sq mi (65.60 km2)
 • Land 24.72 sq mi (64.03 km2)
 • Water 0.60 sq mi (1.56 km2)  2.38%
Area rank 106th of 565 in state
5th of 22 in county
Elevation
528 ft (161 m)
Population
 (2020)
 • Total 2,894
 • Estimate 
(2023)
2,926
 • Rank 453rd of 565 in state
14th of 22 in county
 • Density 117.1/sq mi (45.2/km2)
 • Density rank 533rd of 565 in state
18th of 22 in county
Time zone UTC−05:00 (Eastern (EST))
 • Summer (DST) UTC−04:00 (Eastern (EDT))
ZIP Codes
07825 – Blairstown
07832 – Columbia
07833 – Delaware
Area code(s) 908
FIPS code 3404137320
GNIS feature ID 0882241

Knowlton Township is a small community in Warren County, New Jersey. In 2020, about 2,894 people lived here. This number was a little lower than in 2010, but higher than in 2000.

History of Knowlton Township

Knowlton Township was first created on February 23, 1763, by a special permission from the King, called a Royal charter. At that time, it was part of Sussex County. Later, on February 21, 1798, it officially became a township. Then, in 1824, it became part of the new Warren County.

Over the years, parts of Knowlton Township were used to form other towns. For example, Hope Township was formed in 1839, and Blairstown Township was formed in 1845.

What's in a Name?

The name "Knowlton" might come from a brave soldier named Thomas Knowlton. He was a Colonel in the Continental Army during the American Revolutionary War. Sadly, he died in battle. Another idea is that the name comes from the word "knolls," which means small hills. This makes sense because the area has many rolling hills. Sometimes, older maps even spelled it "Knawltown."

Local Communities and Mail

Knowlton Township uses postal ZIP Codes from nearby towns like Columbia (07832) and Delaware (07833). A few residents also get their mail from the Blairstown (07825) post office. Inside the township, you'll find several small villages and areas. These include Browning, Deckers Ferry, Mount Pleasant, Polkville, Ramseyburg, Warrington, and Knowlton itself.

Geography of the Township

Knowlton Township covers about 25.33 square miles (65.60 square kilometers). Most of this area is land, with a small part being water. The township is located in the Kittatinny Valley. This valley is part of the much larger Great Appalachian Valley, which stretches for 700 miles from Canada to Alabama.

Neighboring Towns

Knowlton Township shares its borders with several other towns in Warren County. These include Blairstown Township, Hardwick Township, Hope Township, and White Township.

Small Communities Inside Knowlton

Within Knowlton Township, there are several small, unincorporated communities. These are places that don't have their own separate local government. Some of these include Columbia, Delaware, and Hainesburg. Other small areas are Browning, Deckers Ferry, Mount Pleasant, Polkville, Ramseyburg, and Warrington.

Population and People

Historical population
Census Pop.
1810 2,064
1820 2,701 30.9%
1830 2,827 4.7%
1840 2,310 * −18.3%
1850 1,356 * −41.3%
1860 1,557 14.8%
1870 1,691 8.6%
1880 1,476 −12.7%
1890 1,411 −4.4%
1900 1,210 −14.2%
1910 1,556 28.6%
1920 1,073 −31.0%
1930 1,049 −2.2%
1940 1,084 3.3%
1950 1,260 16.2%
1960 1,442 14.4%
1970 1,738 20.5%
1980 2,074 19.3%
1990 2,543 22.6%
2000 2,977 17.1%
2010 3,055 2.6%
2020 2,894 −5.3%
2023 (est.) 2,926 −4.2%
Population sources:
1810–1920 1840 1850–1870
1850 1870 1880–1890
1890–1910 1910–1930
1940–2000 2000
2010 2020
* = Lost territory in previous decade

In 2010, the 2010 United States census counted 3,055 people living in Knowlton Township. There were 1,097 households, which are groups of people living together. Most people (96%) were White. About 1% were Black or African American, and another 1% were Asian. A small number of people were Native American or from other backgrounds. About 3.6% of the population identified as Hispanic or Latino.

Who Lives Here?

About 33.5% of households had children under 18. Most households (66.5%) were married couples. The average household had 2.75 people. The average family had 3.10 people.

The median age in Knowlton Township was 44.8 years old. This means half the people were younger than 44.8, and half were older. About 23.3% of the population was under 18.

Education in Knowlton

Fairview Schoolhouse, Knowlton Township, NJ - looking north
Fairview Schoolhouse, built in 1835 with an octagon shape

Younger students in Knowlton Township attend the Knowlton Township Elementary School. This school serves children from pre-kindergarten through sixth grade. In the 2019–2020 school year, there were 155 students and 23 teachers. This means there were about 6.7 students for every teacher.

High School Students

Students in seventh through twelfth grade go to North Warren Regional High School. This high school is located in Blairstown. It serves students from Knowlton, Blairstown, Frelinghuysen, and Hardwick townships. In 2019–2020, the high school had 752 students and 69 teachers.

Other School Options

Students from Knowlton Township can also choose to attend other schools. The Ridge and Valley Charter School in Frelinghuysen Township is an option for grades K–8. Students from Knowlton get special preference for admission there. For high school, students can attend Warren County Technical School in Washington borough. This school offers technical and career training.

Recreation and Fun

Tunnel Field is the main place for outdoor activities in Knowlton Township. It has several fields for baseball, softball, and soccer. There's also a play area with swings, a basketball court, and a tennis court. You can also find a paved walking track and a snack stand. The field is located near Route 94. It's divided by an old railway line, but a tunnel connects the two parts, which is how it got its name.

Transportation and Roads

2021-06-16 09 23 39 View west along Interstate 80 from the overpass for Decatur Street in Knowlton Township, Warren County, New Jersey
View west along Interstate 80 in Knowlton Township

As of 2010, Knowlton Township had about 67.96 miles of roads. The township maintains most of these roads. The county and state also maintain some important roads.

Major Roads

Interstate 80 is a major highway that runs through the township for about 7.24 miles. It connects Knowlton to places further east in New Jersey and west in Pennsylvania. Many residents use I-80 to get to their jobs. Route 94 also passes through the northern part of the township. U.S. Route 46 runs through the southern part.

Bridges to Pennsylvania

Two bridges cross the Delaware River, connecting Knowlton Township to Pennsylvania. The Portland–Columbia Toll Bridge (part of Route 94) opened in 1953. It connects to Pennsylvania Route 611 in Portland, Pennsylvania. There's also the Portland–Columbia Pedestrian Bridge. This bridge was built in 1869 and is now used only by people walking or biking.

Warrington Stone Bridge over the Paulins Kill, Warrington, NJ
The Warrington Stone Bridge crosses the beautiful Paulins Kill.
Paulins Kill Viaduct, Hainesburg, NJ - October 2023
In the woods near Hainesburg is the Paulinskill Viaduct along the Lackawanna Cut-Off, a former railroad line. This viaduct was the largest reinforced concrete structure in the world when it was finished in 1910.

Places to Visit

Notable People from Knowlton

Many interesting people have connections to Knowlton Township. Here are a few:

  • A. Elizabeth Adams (1892–1962), a zoologist and professor.
  • Charles H. Flummerfelt (1863–1931), a politician who served in the state government of Washington.
  • Cornelius Edward Gallagher (1921–2018), a politician who represented New Jersey in the U.S. House of Representatives.
  • Philip Johnson (1818–1867), a politician who represented Pennsylvania in the U.S. House of Representatives.
  • Jonathan Sonne, a professional Magic: The Gathering player.
  • William Henry Witte (1817–1876), another politician who served in the U.S. House of Representatives from Pennsylvania.

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