Johnson County
- Population
- 5,261
- Area
- 376.08 sq mi (974.03 km²), 0.66 sq mi water
- Median age
- 41.1
- Households
- 1,708
- Persons per household
- 2.5
- Median household income
- $57,632
- Median house value
- $155,500
Demographics: 2020–2024 ACS
Demographics: 2020–2024 ACS