Dewey County
- Population
- 4,360
- Area
- 999.63 sq mi (2,589.02 km²), 8.75 sq mi water
- Median age
- 38.5
- Households
- 1,631
- Persons per household
- 2.6
- Median household income
- $62,569
- Median house value
- $133,600
Demographics: 2020–2024 ACS
Overnight
54°F
Mostly Clear
Monday
82°F
Sunny
Monday Night
59°F
Clear
Tuesday
86°F
Sunny