Illinois State Route 251 is the main north-south surface route through Winnebago County, east of the Rock River. This highway connects the north and south sides of the Rockford-Metro to Downtown Rockford. IL St Rt 251 passes through the following towns in Winnebago County. Rockford
Loves Park Machesney Park Roscoe IL St Rt 251 is not multi-plexed in Winnebago County. IL St Rt 251 intersects the following highways in Winnebago County. U.S. Rt. 20, at Rockford. BUSN. U.S. Rt. 20, at Rockford.
A Winnebago County mile marker. A BGS on EB U.S. Rt. 20. A BGS on WB U.S. Rt. 20. NB IL St Rt 251 south of Harrison Ave in Rockford. SB IL St Rt 251 south of IL St Rt 173. A BGS on WB Winnebago County 9. A BGS on EB Winnebago County 9. A junction marker on SB U.S. Rt. 51. A guide sign on WB IL St Rt 75. Looking south at the northern start point. The northern end marker.
