| Capital: | Morris |
|---|---|
| Origen y Formación del condado: | LaSalle County |
| Población: | 50,063 habitantes |
| Área: | 420 sq mi |
| Localización del condado dentro de Illinois: |
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Localidades en Grundy, Illinois
- Aux Sable Township Grundy County
- Braceville
- Carbon Hill
- Channahon
- Coal City
- Diamond
- East Brooklyn
- Erienna Township Grundy County
- Felix Township Grundy County
- Gardner
- Garfield Township Grundy County
- Godley
- Goodfarm Township Grundy County
- Goose Lake Township Grundy County
- Highland Township Grundy County
- Kinsman
- Mazon
- Minooka
- Morris
- Nettle Creek
- Norman Township Grundy County
- Seneca
- South Wilmington
- Verona
- Wauponsee Township Grundy County