| Capital: | Louisville |
|---|---|
| Origen y Formación del condado: | Wayne, Lawrence, Fayette, and Crawford County |
| Población: | 13,815 habitantes |
| Área: | 469 sq mi |
| Localización del condado dentro de Illinois: |
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Localidades en Clay, Illinois
- Bible Grove Township Clay County
- Blair Township Clay County
- Clay City
- Flora
- Harter Township Clay County
- Hoosier Township Clay County
- Ingraham
- Iola
- Larkinsburg Township Clay County
- Louisville
- Oskaloosa Township Clay County
- Pixley Township Clay County
- Sailor Springs
- Songer Township Clay County
- Xenia