Essex is located in Illinois. Essex, Illinois has a population of 741. Essex is more family-centric than the surrounding county with 30% households with children. The county percentage for households with children is 27%.
The median household income in Essex, Illinois is $83,793. The median household income for the surrounding county is $60,559 compared to the national median of $66,222. The median age of people living in Essex is 44.3 years.
The average high temperature in July is 84.3 degrees, with an average low temperature in January of 12.34 degrees. The annual precipitation is 35.7.