Mt Olive is located in Illinois. Mt Olive, Illinois has population of974.
The median household income in Mt Olive, Illinois is $58,953. The median household income for the surrounding county is $56,452 compared to the national median of $66,222. The median age of people living in Mt Olive is 42.5 years.
The average high temperature in July is 89.52 degrees, with an average low temperature in January of 19.81 degrees. The annual precipitation is 38.73.