Eureka is located in Illinois. Eureka, Illinois 61530has a population of 4,908. Eureka 61530 is less family-centric than the surrounding county with 30% households with children. The county percentage for households with children is 31%.
The median household income in Eureka, Illinois 61530 is $59,464. The median household income for the surrounding county is $74,571 compared to the national median of $66,222. The median age of people living in Eureka 61530 is 35.4 years.
The average high temperature in July is 86.02 degrees, with an average low temperature in January of 13.04 degrees. The annual precipitation is 34.78.