Blairstown (CDP), New Jersey

Blairstown is an unincorporated community and census-designated place (CDP) located within Blairstown Township, in Warren County, in the U.S. state of New Jersey. The CDP was created as part of the 2010 United States census. As of the 2010 United States census, the CDP's population was 515.

Geography
According to the United States Census Bureau, the CDP had a total area of 0.432 square miles (1.120 km2), including 0.425 square miles (1.102 km2) of land and 0.007 square miles (0.019 km2) of water (1.65%).

2010 census
The 2010 United States census counted 515 people, 201 households, and 134 families in the CDP. The population density was 1210.7 /sqmi. There were 219 housing units at an average density of 514.8 /sqmi. The racial makeup was 96.89% (499) White, 0.78% (4) Black or African American, 0.00% (0) Native American, 0.58% (3) Asian, 0.00% (0) Pacific Islander, 0.97% (5) from other races, and 0.78% (4) from two or more races. Hispanic or Latino of any race were 3.50% (18) of the population.

Of the 201 households, 30.3% had children under the age of 18; 41.8% were married couples living together; 17.4% had a female householder with no husband present and 33.3% were non-families. Of all households, 26.4% were made up of individuals and 5.5% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.93.

22.7% of the population were under the age of 18, 10.7% from 18 to 24, 25.8% from 25 to 44, 32.6% from 45 to 64, and 8.2% who were 65 years of age or older. The median age was 37.6 years. For every 100 females, the population had 114.6 males. For every 100 females ages 18 and older there were 109.5 males.