| Capital: | Morrison |
|---|---|
| Origen y Formación del condado: | Jo Daviess and Henry County |
| Población: | 58,498 habitantes |
| Área: | 685 sq mi |
| Localización del condado dentro de Illinois: |
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Localidades en Whiteside, Illinois
- Albany
- Albany Township Whiteside County
- Clyde Township Whiteside County
- Coleta
- Coloma Township Whiteside County
- Deer Grove
- Erie
- Erie Township Whiteside County
- Fenton Township Whiteside County
- Fulton
- Fulton Township Whiteside County
- Galt
- Garden Plain Township Whiteside County
- Genesee Township Whiteside County
- Hahnaman Township Whiteside County
- Hopkins Township Whiteside County
- Hume Township Whiteside County
- Jordan Township Whiteside County
- Lyndon
- Lyndon Township Whiteside County
- Montmorency Township Whiteside County
- Morrison
- Mount Pleasant Township Whiteside County
- Newton Township Whiteside County
- Portland Township Whiteside County
- Prophetstown
- Prophetstown Township Whiteside County
- Rock Falls
- Sterling
- Sterling Township Whiteside County
- Tampico
- Tampico Township Whiteside County
- Union Grove Township Whiteside County
- Ustick Township Whiteside County