Rock County, Wisconsin
Rock County | |
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U.S. county | |
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Coordinates: 42°40′N 89°04′W / 42.67°N 89.07°W | |
Country | United States |
State | Wisconsin |
Founded | 1839 |
Named for | Rock River |
Seat | Janesville |
Largest city | Janesville |
Area | |
• Total | 726 sq mi (1,880 km2) |
• Land | 718 sq mi (1,860 km2) |
• Water | 8.0 sq mi (21 km2) 1.1%% |
Population (2010) | |
• Total | 160,331 |
• Estimate (2020) | 163,084 |
• Density | 220/sq mi (85/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional districts | 1st, 2nd |
Website | www |
Rock County is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 160,331.[1] Its county seat is Janesville.[2]
Rock County comprises the Janesville-Beloit, WI Metropolitan Statistical Area and is included in the Madison-Janesville-Beloit, WI Combined Statistical Area.
History[]
Rock County was created in 1836 as a territorial county on December 7, 1836 from Milwaukee County and fully organized February 19, 1839.[3] The county is named for the Rock River, which bisects the county from north to south.[4]
Geography[]
According to the U.S. Census Bureau, the county has a total area of 726 square miles (1,880 km2), of which 718 square miles (1,860 km2) is land and 8.0 square miles (21 km2) (1.1%) is water.[5]
Cook Memorial Arboretum, a natural area with birding and nature trails, is located northwest of Janesville. It is owned by the Janesville School District.[6]
Transportation[]
Major highways[]
- Interstate 39
- Interstate 43
- Interstate 90
- U.S. Highway 12
- U.S. Highway 14
- U.S. Highway 51
- Highway 11
- Highway 26
- Highway 59
- Highway 67
- Highway 81
- Highway 89
- Highway 104
- Highway 140
- Highway 213
Airport[]
Southern Wisconsin Regional Airport (KJVL) serves Rock County and the surrounding communities.
Adjacent counties[]
- Green County – west
- Dane County – north
- Jefferson County – northeast
- Walworth County – east
- Boone County, Illinois – south
- Winnebago County, Illinois – south
Demographics[]
Historical population | |||
---|---|---|---|
Census | Pop. | %± | |
1840 | 1,701 | — | |
1850 | 20,750 | 1,119.9% | |
1860 | 36,690 | 76.8% | |
1870 | 39,030 | 6.4% | |
1880 | 38,823 | −0.5% | |
1890 | 43,220 | 11.3% | |
1900 | 51,203 | 18.5% | |
1910 | 55,538 | 8.5% | |
1920 | 66,150 | 19.1% | |
1930 | 74,206 | 12.2% | |
1940 | 80,173 | 8.0% | |
1950 | 92,778 | 15.7% | |
1960 | 113,913 | 22.8% | |
1970 | 131,970 | 15.9% | |
1980 | 139,420 | 5.6% | |
1990 | 139,510 | 0.1% | |
2000 | 152,307 | 9.2% | |
2010 | 160,331 | 5.3% | |
2020 (est.) | 163,084 | [7] | 1.7% |
U.S. Decennial Census[8] 1790–1960[9] 1900–1990[10] 1990–2000[11] 2010–2020[1] |
As of the census[12] of 2000, there were 152,307 people, 58,617 households, and 40,387 families residing in the county. The population density was 211 people per square mile (82/km2). There were 62,187 housing units at an average density of 86 per square mile (33/km2). The racial makeup of the county was 91.01% white, 4.63% black or African American, 0.28% Native American, 0.78% Asian, 0.04% Pacific Islander, 1.77% from other races, and 1.50% from two or more races. 3.91% of the population were Hispanic or Latino of any race. 32.8% were of German, 13.0% Norwegian, 10.1% Irish, 7.5% English and 5.5% American ancestry.
There were 58,617 households, out of which 33.60% had children under the age of 18 living with them, 53.50% were married couples living together, 10.90% had a female householder with no husband present, and 31.10% were non-families. 25.10% of all households were made up of individuals, and 9.70% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 3.03.
In the county, the population was spread out, with 26.50% under the age of 18, 8.60% from 18 to 24, 29.80% from 25 to 44, 22.30% from 45 to 64, and 12.70% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 97.00 males. For every 100 females age 18 and over, there were 94.10 males.
Communities[]
Cities[]
- Beloit
- Brodhead (mostly in Green County)
- Edgerton (partly in Dane County)
- Evansville
- Janesville
- Milton
Villages[]
Towns[]
Census-designated place[]
Unincorporated communities[]
- Afton
- Anderson
- Avon
- Avalon
- Belcrest
- Bergen
- Cainville
- Center
- Charlie Bluff
- Cooksville
- Coopers Shores
- Crestview
- Emerald Grove
- Fairfield (partial)
- Foxhollow
- Fulton
- Indianford
- Johnstown
- Johnstown Center
- Koshkonong (partial)
- Leyden
- Lima Center
- Magnolia
- Maple Beach
- Newark
- Newville
- Porters
- Shopiere
- Stebbinsville
- Tiffany
- Union
- Victory Heights
Ghost towns/neighborhoods[]
- Fellows
- Jefferson Prairie Settlement
Politics[]
Hillary Clinton carried the county in 2016, but it was the smallest margin of victory since Michael Dukakis in 1988.
Tree cities[]
- Beloit
- Clinton
- Edgerton
- Evansville
- Janesville
See also[]
References[]
- ^ Jump up to: a b "State & County QuickFacts". United States Census Bureau. Archived from the original on February 27, 2016. Retrieved January 23, 2014.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
- ^ "Wisconsin: Individual County Chronologies". Wisconsin Atlas of Historical County Boundaries. The Newberry Library. 2007. Archived from the original on April 14, 2017. Retrieved August 15, 2015.
- ^ "Rock County, origin of place name" Dictionary of Wisconsin History.
- ^ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved August 8, 2015.
- ^ Great Wisconsin Birding & Nature Trail. Cook Memorial Arboretum.
- ^ "County Population Totals: 2010-2020". Retrieved June 20, 2021.
- ^ "U.S. Decennial Census". United States Census Bureau. Retrieved August 8, 2015.
- ^ "Historical Census Browser". University of Virginia Library. Retrieved August 8, 2015.
- ^ Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved August 8, 2015.
- ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved August 8, 2015.
- ^ "U.S. Census website". United States Census Bureau. Retrieved May 14, 2011.
- ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved November 11, 2020.
Further reading[]
- Brown, William F. Rock County, Wisconsin: A New History... Vol. 1, Chicago: Cooper, 1908.
- Brown, William F. Rock County, Wisconsin: A New History... Vol. 2, Chicago: Cooper, 1908.
- Commemorative Biographical Record of the Counties of Rock, Green, Grant, Iowa, and Lafayette, Wisconsin, Containing Biographical Sketches of Prominent and Representative Citizens, and of Many of the Early Settled Families. Chicago: J. H. Beers and Co., 1901.
- The History of Rock County, Wisconsin. Chicago: Western Historical Company, 1879.
- Portrait and Biographical Album of Rock County, Wisconsin. Chicago: Acme Publishing Company, 1889.
- Sayre, David F. "Early Life in Southern Wisconsin", Wisconsin Magazine of History, vol. 3, no. 4 (June 1920), pp. 420–427.
- Smith, Isaac T. "Early Settlement of Rock County" in Wisconsin Historical Collections, vol. VI. Madison, Wis.: Atwood & Culver, 1872, pp. 416–425.
- Walterman, Thomas. There Stands "Old Rock": Rock County, Wisconsin and the War to Preserve the Union. Friendship, Wis.: New Past Press, 2001. ISBN 0-938627-50-3
External links[]
- Rock County government website
- Rock County map from the Wisconsin Department of Transportation
- Rock County 5.0
- Rock County Historical Society
- Rock County Genealogical Society
- Beloit Janesville Symphony
- Wisconsin counties
- Rock County, Wisconsin
- 1839 establishments in Wisconsin Territory
- Populated places established in 1839