Johnston City is located in Illinois. Johnston City, Illinois has a population of 3,498. Johnston City is less family-centric than the surrounding county with 18.67% of the households containing married families with children. The county average for households married with children is 27.95%.
The median household income in Johnston City, Illinois is $32,826. The median household income for the surrounding county is $48,600 compared to the national median of $57,652. The median age of people living in Johnston City is 44.8 years.
The average high temperature in July is 85.9 degrees, with an average low temperature in January of 21.2 degrees. The average rainfall is approximately 45.6 inches per year, with 14.4 inches of snow per year.
