De Witt County Highway 21 is the north-south highway running from Illinois State Route 54, near Birkbeck, to De Witt County Highway 10. DWCH 21 passes through the following town in De Witt County. Birkbeck DWCH 21 intersects the following highways in De Witt County. Illinois State Route 54, near Birkbeck. De Witt County Highway 10, near Birkbeck.
NB DWCH 21 north of IL St Rt 54. A DWCH 21 guide marker.
