Merrillville is located in Lake county Indiana with a geographic area of 33.2 square miles. The total population in Merrillville is 34,871 with 47.0% male and 53.0% female. Children under age 5 represent 4.7% of the population, under age 18 equal 22.9% of the population and over age 65 is 17.4% of the population. The median household income is $63,381, per capita income is $31,412. There are a total of 14,533 housing units with 65.8% owner occupied. Education includes 30.6% of residents that are high school graduates and 26.3% with a bachelor's degree or higher. The average temperature in Merrillville in the summer is 73 degrees, and in the winter 29 degrees.
