U.S. Federal Route 20 is the main east-west highway across Central Jo Daviess County. This runs from the Iowa/Illinois State Line, at East Dubuque, to the Jo Daviess/Stephenson County Line, near Kent. U.S. Rt. 20 passes through the following towns in Jo Daviess County. East Dubuque
WB U.S. Rt. 20 crossing the Mississippi River. WB U.S. Rt. 20 crossing the Mississippi River. WB U.S. Rt. 20 crossing the Mississippi River. EB U.S. Rt. 20 crossing the Mississippi River. The Illinois Welcome Sign on EB U.S. Rt. 20 at East Dubuque. EB U.S. Rt. 20 at the Illinois Welcome Sign. (August, 2024) EB U.S. Rt. 20/SB IL St Rt 84 near Galena. EB U.S. Rt. 20/SB IL St Rt 84 in Galena. A Jo Daviess County mile marker. EB U.S. Rt. 20/SB IL St Rt 84 near Lake Galena. EB U.S. Rt. 20/SB IL St Rt 84 near Elizabeth. A junction marker on EB U.S. Rt. 20/SB IL St Rt 84. WB U.S. Rt. 20/SB IL St Rt 78 east of Main Street in Stockton. WB U.S. Rt. 20 at north IL St Rt 78. WB U.S. Rt. 20 east of north IL St Rt 78. WB U.S. Rt. 20 at the Jo Davies/St. Joseph County Line.
