Living in Jefferson County, Illinois

Jefferson County is a county in Illinois with a population of around 38,353. The main communities are Mount Vernon, Nason.

Cost of Living

Median rent is $1,352/month, around the national average, with a median home price of around $107K. The county has one of the lowest unemployment rates in the country at 1.7%.

Weather and Climate

The climate brings cold winters (highs around 44°F) and hot summers (highs around 85°F). Natural hazard risks include earthquake risk and tornado risk.

Demographics

Jefferson County has middle-aged demographics, with a median age of 41 and a predominantly working-class population (18% of adults hold a bachelor's degree or higher). The county votes strongly Republican.