Illinois State Route 111 is a north-south highway in Western Macoupin County. This runs from the Macoupin/Jersey County Line, at Brighton, to the Macoupin/Morgan County Line near Modesto. IL St Rt 111 passes through the following towns in Macoupin County. Brighton
Summerville Chesterfield Reader Hettick
IL St Rt 111 is multi-plexed in Macoupin County. Illinois State Route 267, from Medora to the Jersey/Macoupin County Line.