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Learn about the history, government, and services of Jefferson County, where Mt. Vernon is the county seat. Find news, events, bids, and contact information on the website.
- Government
Government - Jefferson County - Illinois
- County Board
County Board Executive Assistant - Brittney Hefner. T:...
- County Courts
County Courts - Jefferson County - Illinois
- Departments
Departments - Jefferson County - Illinois
- Community
According to data gathered for the 2010 census, Jefferson...
- Townships
Townships - Jefferson County - Illinois
- Documents & Reports
Documents & Reports - Jefferson County - Illinois
- Elections
The form to cancel your voter registration in Jefferson...
- Government
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 seat is Mount Vernon. Jefferson County contains the Mount Vernon, Illinois micropolitan area. It is located in the southern portion known locally as "Little Egypt".
Home. Departments. Assessor. OVERVIEW. The Assessor (formally known as the Supervisor of Assessments) is appointed by statute to 4-year terms. The department is responsible for the overall property tax assessment process within the County of Jefferson, which includes 11 townships and multi-township assessment districts.
May 17, 2024 · 2022 Population. Population Change. Latest update on July 2022. Home. / Our Changing Population. USA. / Illinois. / Jefferson County. Year. 2010. Year. to. Year. 2022. Year. How has the population changed in Jefferson County? County changes over time.
With project sites as large as 450 acres and available buildings of up to 50,000 square feet, Jefferson County, Illinois offers companies excellent and affordable options for companies in many industries. Jefferson County has been a center for top-quality manufacturing since the late 1800s.
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The Village and the Museum, with their buildings and contents, reflect life from the beginning of Jefferson County. Among the furnished buildings, one finds log houses of the 19th century, a log church, a log jail, a one-room school, functional blacksmith and print shops, a display of period merchandise in the general store, and a variety of medical equipment in the Medical Building.