Rock County , Wisconsin

Rock County: County in Wisconsin, United States

Rock County locator map
Location of Rock County on Wisconsin map.

About

Rock County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 160,331. After 10 years in 2020 county had an estimated population of 163,084 inhabitants. Its county seat is Janesville. The county was created 184 years ago in 1836.

Rock County Courthouse  Wisconsin image
Rock County Courthouse Wisconsin
Rock County Courthouse  Wisconsin image

Geography

Rock County is located at 42°40'16"N 89°4'18"W (42.6712200, -89.0715800). It has 7 neighbors: Boone County, Winnebago County, Dane County, Green County, Jefferson County, Walworth County and Washburn County.

Rock County map

The largest city of Rock County is City of Janesville with a population of 64,128. Other cities include, Beloit population 7,716, Evansville population 5,556, Edgerton population 5,525 and Janesville population 3,612. See all Rock County cities & populated places.

Rock County Quick Facts

Population : 163,084 (2020)
Country : United States of America
State : Wisconsin (United States)
Different from : Rock County, Rock Island County, Rock County
Water as percent of area : 1.1%
Land as percent of area : 98.9%
Named for : Rock River, landscape
Altitude : 2,648 feet / 807, 249 meters
Capital : Janesville
Establishment : January 01, 1970
Time Zone : America/Chicago
Local time : 18:22:12 (21st October 2021)
Population growth : 1.69% (2010-2020)

Rock County has 7 neighbours.

  • Janesville

Demographics

The population of Rock County increased by 1.69% in 10 years.

Year Population % Change Method
2010 160,331 - census
2011 159,867 -0.29% estimation process
2012 160,065 0.12% estimation process
2013 160,341 0.17% estimation process
2014 160,920 0.36% estimation process
2015 161,006 0.05% estimation process
2016 161,320 0.19% estimation process
2017 162,205 0.55% estimation process
2018 162,874 0.41% estimation process
2019 163,354 0.29% estimation process
2020 163,084 -0.17% estimation process

Comitatul Rock, Comte de Rock, Comté de Rock, Condado de Rock, Condado han Rock, Contea di Rock, Hrabstwo Rock, Okrug Rok, Quan Rock, Quận Rock, Rock, Rock Comitatus, Rock Kun, Rock Kūn, Rock konderria, Rock megye, Rok, luo ke xian, raka ka'unti, rokku jun, shhrstan rak wyskansyn, Округ Рок, Рок, راک کاؤنٹی، وسکونسن, شهرستان راک، ویسکانسین, রক কাউন্টি, ロック郡, 羅克縣

People born in Rock County (3)

People born in Rock County, including astronomer Olin J. Eggen, REcipient of the Navy Cross Frederick Curtice Davis, US Military Academy superintendent William Durward Connor, you can see a list of people who born in Rock County.

Other places with the same name (3)

Rock County Populated Places (more)

Cities, Towns, Neighborhoods & Other Populated Places in Rock County.

City Name Population Title
Beloit 7,716 City in Rock County, Wisconsin, United States
Evansville 5,556 City in Rock County, Wisconsin, United States
Edgerton 5,525 City in Rock County, Wisconsin, United States
Koshkonong 3,782 Civil town in Jefferson County, Wisconsin
Janesville 3,612 City in and county seat of Rock County, Wisconsin
Fulton 3,435 Town in Rock County, Wisconsin, United States
Milton 3,126 City in Rock County, Wisconsin
Newark 1,617 Civil town in Rock County, Wisconsin
Orfordville 1,486 Village in Rock County, Wisconsin
Clinton 1,446 Village in Rock County, Wisconsin, United States
Bergen 1,364 Unincorporated community in Rock County, Wisconsin
Fairfield 1,104 Civil town in Sauk County, Wisconsin
Footville 822 Village in Rock County, Wisconsin
Magnolia 808 Civil town in Rock County, Wisconsin
Johnstown 791 Town in Rock County, Wisconsin, United States
Tiffany 650 City in Wisconsin

Wisconsin Other Counties (more counties)

County Name Population Title
Milwaukee County 945,016 County in Wisconsin, United States
Milwaukee 589,067 City in and county seat of Milwaukee County, Wisconsin, United States
Dane County 552,536 County in Wisconsin, United States
Waukesha County 406,172 County in Wisconsin, United States
Brown County 264,610 County in Texas, United States
Racine County 195,802 County in Wisconsin, United States
Outagamie County 188,766 County in Wisconsin, United States
Winnebago County 171,631 County in Wisconsin, United States
Kenosha County 169,671 County in Wisconsin, United States
Washington County 136,445 County in Wisconsin, United States
Marathon County 135,593 County in Wisconsin, United States
La Crosse County 118,502 County in Wisconsin, United States
Sheboygan County 115,240 County in Wisconsin, United States
Eau Claire County 105,260 County in Wisconsin, United States
Walworth County 103,953 County in Wisconsin, United States
Fond du Lac County 102,902 County in Wisconsin, United States