Roads of the Mid-South & West > Highways of the State of Illinois > County Highways of the State of Illinois > County Highways of Shelby County > Shelby County Highway 21
 | Shelby County Highway 21 |
Shelby County Highway 21 is an east-west highway in Northern Shelby County.
WB SCH 21 west of IL St Rt 128.
6 October 2026