Herculaneum is located in Jefferson county Missouri with a geographic area of 4.2 square miles. The total population in Herculaneum is 4,081 with 48.0% male and 52.0% female. Children under age 5 represent 5.8% of the population, under age 18 equal 26.4% of the population and over age 65 is 18.2% of the population. The median household income is $66,773, per capita income is $27,036. There are a total of 1,446 housing units with 77.7% owner occupied. Education includes 23.9% of residents that are high school graduates and 19.1% with a bachelor's degree or higher. The average temperature in Herculaneum in the summer is 74 degrees, and in the winter 32 degrees.
