| Capital: | Jerseyville |
|---|---|
| Origen y Formación del condado: | Greene County |
| Población: | 22,985 habitantes |
| Área: | 369 sq mi |
| Localización del condado dentro de Illinois: |
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Localidades en Jersey, Illinois
- Chautauqua
- Dow
- Elsah
- Elsah Township Jersey County
- English Township Jersey County
- Fidelity
- Fidelity Township Jersey County
- Fieldon
- Grafton
- Jersey Township Jersey County
- Jerseyville
- Mississippi Township Jersey County
- Otter Creek Township Jersey County
- Otterville
- Piasa Township Jersey County
- Quarry Township Jersey County
- Richwoods Township Jersey County
- Rosedale Township Jersey County
- Ruyle Township Jersey County