Caldwell is located in Essex county New jersey with a geographic area of 1.2 square miles. The total population in Caldwell is 7,970 with 49.7% male and 50.3% female. Children under age 5 represent 7.6% of the population, under age 18 equal 19.6% of the population and over age 65 is 14.4% of the population. The median household income is $105,102, per capita income is $50,432. There are a total of 3,163 housing units with 45.5% owner occupied. Education includes 18.4% of residents that are high school graduates and 59.2% with a bachelor's degree or higher. The average temperature in Caldwell in the summer is 73 degrees, and in the winter 34 degrees.