On December 3, 1818, Illinois was admitted as the twenty- first state of the Union. Just a few months later on March 26, 1819, Jefferson County was organized by the settlers in the area. This new county …

Jefferson County was organized in 1819, out of parts of White, Edwards and Franklin Counties. It was named in honor of Thomas Jefferson, principal draftsman of the Northwest Ordinance, among other …

Map of Jefferson County, Illinois showing cities, highways & important places. Check Where is Jefferson County Located, largest cities, population, areas, and travel info at Whereig.com.

Jul 1, 2024 · N Data for this geographic area cannot be displayed because the number of sample cases is too small.

The U.S. Census Bureau says that the county covers 584 square miles (1,510 km2), of which 571 square miles (1,480 km2) are land and 13 square miles (34 km2) are water, or 2.2%. Here is a list of …

Discover the complete list of cities and towns in Jefferson County. Get detailed administrative, cultural, and tourist information for each city.

In the year of 2023, Jefferson County, IL had a population of 36.8k people with a median age of 41.1 and a median household income of $61,102. Between 2022 and 2023 the population of Jefferson …

Jefferson County is a county located in the southern part of the U.S. state of Illinois. According to the 2020 census, it has a population of 37,113. The county...

Explore Jefferson County, IL map with detailed charts and insights into its population, demographics, household information, and more.

Nestled in the southern part of Illinois, Jefferson County is a land that tells stories of pioneers, battles, and the unyielding spirit of the American frontier.