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
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. WB IL St Rt 81 on the westside of Kewanee. A Henry County mile marker. WB IL St Rt 81 west of Cambridge. WB IL St Rt 81 north of Andover. WB IL St Rt 81 west of Andover. A BGS on WB I-74/IL St Rt 110. A BGS on WB I-74/IL St Rt 110. A BGS on WB I-74/IL St Rt 110. WB IL St Rt 81 west of I-74/IL St Rt 110. EB IL St Rt 81 east of U.S. Rt. 150. The western end point for IL St Rt 81. The western end marker.
