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Rock County
Sign in to saveAlso known as Rock County, Wisconsin, Rock County, WI
county in Wisconsin, United States
Key facts
- Country
- United States
- State
- Wisconsin
- Named after
- Rock River
- Seat
- Janesville
- Largest city
- Janesville
- Total
- 726 sq mi (1,880 km )
- Land
- 718 sq mi (1,860 km )
- Water
- 8.0 sq mi (21 km ) 1.1%
- Estimate 2025
- 166,472
- Density
- 228/sq mi (88.0/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional districts
- 1st , 2nd
- Website
- www .co .rock .wi .us
via Wikipedia infobox
Wikidata facts
- Population
- 163687
- Area
- 718.14
- Elevation
- 807
- Official website
- www.co.rock.wi.us
- Image
- Janesville June 2024 118 (Rock County Courthouse).jpg
- Households
- 65237
Show 5 more facts
- Commons category
- Rock County, Wisconsin
- inception
- 1839-00-00
- water as percent of area
- 1.1
- native label
- Rock County
- per capita income
- 29924
Sources (12)
via Wikidata · CC0
~8 min read
Article
Rock County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 163,687. Its county seat is Janesville. Rock County comprises the Janesville–Beloit metropolitan statistical area and is included in the Madison–Janesville–Beloit combined statistical area.
History
Gallery (4)
On the map
Connections
Milton
Entity
Beloit
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Turtle
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African Americans
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United States Census Bureau
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Native Hawaiians
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Clinton
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race and ethnicity in the United States Census
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Janesville
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Union
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Avon
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Newark
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Magnolia
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Johnstown
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Lima
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Madison metropolitan area
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United States
Country
marriage
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Wisconsin
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time zone
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