Illinois State Route 81 is a east-west highway across Central Henry County. It runs from Kewanee to U.S. Rt. 150 near Lynn Center. IL St Rt 81 passes through the following towns in Henry County. Kewanee
Cambridge
Andover
Lynn Center IL St Rt 81 is multi-plexed in Henry County. Illinois State Route 82, near Cambridge.
A junction marker on SB IL St Rt 78. WB IL St Rt 81 just west of IL St Rt 78. WB IL St Rt 81 on the westside of Kewanee. A Henry County mile marker. WB IL St Rt 81 north of Andover. A BGS on WB I-74. The western end point for IL St Rt 81. The western end marker.
