Eureka is located in Woodford county Illinois with a geographic area of 2.7 square miles. The total population in Eureka is 5,485 with 46.2% male and 53.8% female. Children under age 5 represent 6.5% of the population, under age 18 equal 17.8% of the population and over age 65 is 19.4% of the population. The median household income is $46,579, per capita income is $28,072. There are a total of 2,172 housing units with 57.6% owner occupied. Education includes 28.0% of residents that are high school graduates and 33.2% with a bachelor's degree or higher. The average temperature in Eureka in the summer is 74 degrees, and in the winter 27 degrees.
