Stewartsville is located in Warren county New jersey with a geographic area of 1.1 square miles. The total population in Stewartsville is 549 with 39.5% male and 60.5% female. Children under age 5 represent 5.5% of the population, under age 18 equal 18.2% of the population and over age 65 is 14.4% of the population. The median household income is $97,417, per capita income is $51,379. There are a total of 242 housing units with 71.5% owner occupied. Education includes 24.4% of residents that are high school graduates and 38.0% with a bachelor's degree or higher. The average temperature in Stewartsville in the summer is 73 degrees, and in the winter 34 degrees.
