Grundy County
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- Population
- 12,384
- Area
- 501.86 sq mi (1,299.8 km²), 0.03 sq mi water
- Median age
- 41.9
- Households
- 5,117
- Persons per household
- 2.4
- Median household income
- $87,205
- Median house value
- $198,800
Demographics: 2020–2024 ACS
Tonight
50°F
Mostly Clear4% precip
Sunday
66°F
Sunny
Sunday Night
43°F
Clear
Monday
66°F
Sunny