Illinois State Route 43 runs north-south in Eastern Lake County. This is a surface alternative to the multi-lane divided U.S. Rt. 41, which runs to the east of this highway. IL St Rt 43 passes through the following towns in Lake County. Deerfield
Bannockburn Lake Forest Lake Bluff Knollwood North Chicago Waukegan
Park City IL St Rt 43 is not multi-plexed in Lake County. IL St Rt 43 intersects the following highways in Lake County. Illinois State Route 22, at Bannockburn.