Johnson County Address Data
- State: Iowa
- County: Johnson County
- County Seat: Iowa City
- FIPS: 19103
- Founded in: 1837
- Population: 151,260
- Density: 246 Persons/Square Mile
- Area: 612 Square Miles
- Government Type: County
- Authority: Home Rule
- Legislative Body: Board of Supervisors
- Legislative Body Size: 5
- County Contact: 913 S Dubuque St
County Administration Building
Iowa City, IA 52240-4273
- County site: http://www.johnson-county.com
- Labor Force: 85,186
- Unemployment Rate: 1.90%
- Gross Domestic Product (GDP): $8.4 B
Top Cities in Johnson County
Major Cities (population)
Neighbor Counties
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Benton County
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Cedar County
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Iowa County
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Linn County
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Louisa County
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Muscatine County
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Washington County