Jefferson County Profile

Geography: Jefferson County is located in the heart of Southern Illinois at the junction of Interstates 57 and 64. It is one hour east of St. Louis, MO, one hour west of Evansville, IN, ninety minutes north of Paducah, KY and two hours south of Champaign, IL. Mount Vernon is the largest city in Jefferson County. The area of the county is 584 square miles.

Transportation: The intersection of Interstate Highways 57 and 64 have an average daily traffic count of 37,700 vehicles, making transportation an economic driver for the area. Four Class 1 railroads, a short line railroad, and the Mt. Vernon Outland Airport all complement area industry. Although the airport does not have commercial flights, its runways and facility are exceptional and quite adequate for carrier services, private jet landing, refueling, and charter flights. The airport is regularly used for just-in-time cargo delivery.

General Economic Makeup: The Jefferson County area is home to three of the largest employers in Southern Illinois. Continental Tire – the Americas, LLC is the largest, employing 3,600. Walgreens Distribution Center, which opened in 1990, employs 1,500. And SSM Good Samaritan Hospital – Mt. Vernon has 1,362 employees.

The employment base for business is regional and includes eight surrounding counties. The economic strength, stability, and growth of Jefferson County have significant impact on the Southern Illinois region. Jefferson County’s population is 38,827 (2010 Census).

The Jefferson County, Illinois webpage has numerous resources for residents, businesses and visitors. You can access the page at

The following Jefferson County demographic reports are available for download on this page:

Community Profile

Provides population, household and housing unit summaries from 2000 to 2021; includes households by income, type, size, tenure and mortgage status, and by urban/rural status; includes owner-occupied housing units by value; includes population by age, sex, race/ethnicity, relationship and household type, educational attainment, marital status, in labor force, by industry, by occupation, and by urban/rural status; and includes 2016 consumer spending summary.

Household Income Profile

Provides households by income, households by income broken down by age of householder, percent distribution by age of householder for both 2016 and 2021 forecast.

Housing Profile

Includes housing units by occupancy status and tenure, owner-occupied housing units by value, housing units by urban/rural status, owner-occupied units by mortgage status, vacant units by status, occupied units by age of householder and home ownership, occupied units by race/ethnicity of householder and home ownership status, occupied units by size and home ownership status.