Colonia is located in Middlesex county New jersey with a geographic area of 4.0 square miles. The total population in Colonia is 17,782 with 47.2% male and 52.8% female. Children under age 5 represent 4.8% of the population, under age 18 equal 19.9% of the population and over age 65 is 19.7% of the population. The median household income is $108,364, per capita income is $42,686. There are a total of 6,015 housing units with 88.2% owner occupied. Education includes 27.6% of residents that are high school graduates and 40.9% with a bachelor's degree or higher. The average temperature in Colonia in the summer is 73 degrees, and in the winter 34 degrees.
