Jefferson County Courthouse | State of Illinois Office of the Illinois Courts Jefferson County Courthouse Circuit District: 5 | Circuit: 2ndJefferson County 100 S 10th StMount Vernon, IL - Illinois 62864 Trial Court AdministratorLisa Simmons 8:00 a.m. - 4:00 p.m. (618) 244-8007 Visit Website Get Directions Jefferson County Courthouse. In the state of Illinois most counties maintain trial courts in a county-based courthouse, which also house other government offices. Links Disability Information (ADA) e-Filing Jefferson County Circuit Clerk Website Jefferson County Directory Online Records Resources Court Disability Coordinator Lisa Simmonslsimmons@2ndcircuit.us E-filing Kiosk In the main lobby. Food (Vending/Other) Vending machine in the main lobby. Free Parking Internet Local Rules / Orders View Local Rules Lockers Public Transportation South Central Transit – 618-242-0202United Taxi – 618-244-4400 Remote Proceedings View Remote Proceeding Information