Blairstown is a township in Warren County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 5,704, a decrease of 263 (−4.4%) from the 2010 census count of 5,967, which in turn reflected an increase of 220 (+3.8%) from the 5,747 counted in the 2000 census.
The area had been known as Smith's Mill and was later called Butts Bridge (variously spelled as "Butt's Bridge" and "Butts' Bridge"), named for a family that owned the eponymous crossing of the Paulins Kill.
Blairstown was incorporated as a township by an act of the New Jersey Legislature on April 14, 1845, from portions of Knowlton Township, based on the results of a referendum held that day. The township was named for John Insley Blair.
Geography
According to the U.S. Census Bureau, the township had a total area of 30.78 square miles (79.71 km2), including 29.89 square miles (77.41 km2) of land and 0.89 square miles (2.30 km2) of water (2.88%). The township is located in the Kittatinny Valley which is a section of the Great Appalachian Valley that stretches for from Canada to Alabama.
Blairstown CDP (with a 2010 Census population of 515) is an unincorporated community and census-designated place (CDP) located within the township.
Other unincorporated communities, localities and place names located partially or completely within the township include Blair Lake, Cedar Lake, Cooks Pond, Jacksonburg, Kalaroma, Lake Susquehanna, Mount Vernon, Paulina, Vail and Walnut Valley.
White Township borders the Warren County municipalities of Frelinghuysen Township, Hardwick Township, Hope Township and Knowlton Township.
Demographics
The Township's economic data (as is all of Warren County) is calculated by the United States Census Bureau as part of the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area, which also includes Carbon County, Lehigh County and Northampton County counties in Pennsylvania.
2010 census
The 2010 United States census counted 5,967 people, 2,124 households, and 1,703 families in the township. The population density was 193.6 per square mile (74.7/km2). There were 2,272 housing units at an average density of 73.7 per square mile (28.5/km2). The racial makeup was 96.03% (5,730) White, 1.12% (67) Black or African American, 0.12% (7) Native American, 1.14% (68) Asian, 0.00% (0) Pacific Islander, 0.45% (27) from other races, and 1.14% (68) from two or more races. Hispanic or Latino of any race were 3.79% (226) of the population.
Of the 2,124 households, 32.8% had children under the age of 18; 66.8% were married couples living together; 9.4% had a female householder with no husband present and 19.8% were non-families. Of all households, 15.8% were made up of individuals and 6.3% had someone living alone who was 65 years of age or older. The average household size was 2.78 and the average family size was 3.11.
23.9% of the population were under the age of 18, 7.2% from 18 to 24, 20.1% from 25 to 44, 33.3% from 45 to 64, and 15.5% who were 65 years of age or older. The median age was 44.3 years. For every 100 females, the population had 99.4 males. For every 100 females ages 18 and older there were 96.8 males.
The Census Bureau's 2006–2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $82,952 (with a margin of error of +/− $10,269) and the median family income was $92,063 (+/− $14,594). Males had a median income of $73,818 (+/− $7,161) versus $54,959 (+/− $13,254) for females. The per capita income for the borough was $38,393 (+/− $7,342). About 4.1% of families and 5.0% of the population were below the poverty line, including 8.1% of those under age 18 and 1.4% of those age 65 or over.
2000 census
As of the 2000 United States census, there were 5,747 people, 2,040 households, and 1,638 families residing in the township. The population density was . There were 2,136 housing units at an average density of . The racial makeup of the township was 98.17% White, 0.26% African American, 0.14% Native American, 0.56% Asian, 0.02% Pacific Islander, 0.28% from other races, and 0.57% from two or more races. Hispanic or Latino of any race were 1.98% of the population.
There were 2,040 households, out of which 35.0% had children under the age of 18 living with them, 69.6% were married couples living together, 7.3% had a female householder with no husband present, and 19.7% were non-families. 15.3% 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 2.81 and the average family size was 3.14.