| Capital: | Virginia |
|---|---|
| Origen y Formación del condado: | Morgan County |
| Población: | 13,642 habitantes |
| Área: | 376 sq mi |
| Localización del condado dentro de Illinois: |
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Localidades en Cass, Illinois
- Arenzville
- Arenzville Township Cass County
- Ashland
- Ashland Township Cass County
- Beardstown
- Beardstown Township Cass County
- Bluff Springs Township Cass County
- Chandlerville
- Chandlerville Township Cass County
- Hagener Township Cass County
- Newmansville Township Cass County
- Panther Creek Township Cass County
- Philadelphia Township Cass County
- Sangamon Valley Township Cass County
- Virginia
- Virginia Township Cass County