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Rock County, Wisconsin

March 14, 2024

Rock County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 163,687.[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.

Rock County
County
Rock County Courthouse
Seal
Location within the U.S. state of Wisconsin
Wisconsin's location within the U.S.
Coordinates: 42°40′N 89°04′W / 42.67°N 89.07°W / 42.67; -89.07
Country United States
State Wisconsin
Founded1839
Named forRock River
SeatJanesville
Largest cityJanesville
Area
 • Total726 sq mi (1,880 km2)
 • Land718 sq mi (1,860 km2)
 • Water8.0 sq mi (21 km2)  1.1%
Population
 (2020)[1]
 • Total163,687
 • Density230/sq mi (87/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional districts1st, 2nd
Websitewww.co.rock.wi.us

History edit

Rock County was created 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 edit

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 edit

Major highways edit

Railroads edit

Buses edit

Airport edit

Southern Wisconsin Regional Airport (KJVL) serves Rock County and the surrounding communities.

Adjacent counties edit

Demographics edit

Historical population
CensusPop.Note%±
18401,701—
185020,7501,119.9%
186036,69076.8%
187039,0306.4%
188038,823−0.5%
189043,22011.3%
190051,20318.5%
191055,5388.5%
192066,15019.1%
193074,20612.2%
194080,1738.0%
195092,77815.7%
1960113,91322.8%
1970131,97015.9%
1980139,4205.6%
1990139,5100.1%
2000152,3079.2%
2010160,3315.3%
2020163,6872.1%
U.S. Decennial Census[7]
1790–1960[8] 1900–1990[9]
1990–2000[10] 2010[11] 2020[1]

As of the census of 2020,[1] the population was 163,687. The population density was 227.9 people per square mile (88.0 people/km2). There were 70,068 housing units at an average density of 97.6 units per square mile (37.7 units/km2). The racial makeup of the county was 81.3% White, 5.1% Black or African American, 1.3% Asian, 0.5% Native American, 4.6% from other races, and 7.2% from two or more races. Ethnically, the population was 9.7% Hispanic or Latino of any race.

 
2000 Census Age Pyramid for Rock County

As of the census[12] of 2010, there were 160,331 people residing in the county.

As of the census[12] of 2000, were 152,307 people, 58,617 households, and 40,387 families residing in the county. The population density was 211 people per square mile (81 people/km2). there were 62,187 housing units at an average density of 86 units per square mile (33 units/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 edit

Cities edit

Villages edit

Towns edit

Census-designated places edit

Unincorporated communities edit

Ghost towns/neighborhoods edit

Politics edit

Since 1988, Rock County has consistently voted for the Democratic candidate in every Presidential election. In 2016, Hillary Clinton carried the county by the smallest margin of victory since Michael Dukakis in 1988.

United States presidential election results for Rock County, Wisconsin[13]
Year Republican Democratic Third party
No.  % No.  % No.  %
2020 37,138 43.51% 46,658 54.66% 1,564 1.83%
2016 31,493 41.40% 39,339 51.71% 5,242 6.89%
2012 30,517 37.82% 49,219 61.00% 954 1.18%
2008 27,364 34.56% 50,529 63.82% 1,276 1.61%
2004 33,151 41.19% 46,598 57.90% 730 0.91%
2000 27,467 39.01% 40,472 57.49% 2,465 3.50%
1996 20,096 33.32% 32,450 53.80% 7,774 12.89%
1992 21,942 31.79% 31,154 45.13% 15,929 23.08%
1988 28,178 48.43% 29,576 50.83% 434 0.75%
1984 32,491 54.76% 26,433 44.55% 410 0.69%
1980 30,960 50.60% 24,740 40.44% 5,482 8.96%
1976 28,325 49.04% 28,048 48.56% 1,389 2.40%
1972 30,361 58.03% 21,033 40.20% 925 1.77%
1968 25,229 50.97% 20,567 41.56% 3,697 7.47%
1964 20,372 41.85% 28,257 58.04% 55 0.11%
1960 29,675 60.63% 19,194 39.22% 76 0.16%
1956 28,980 67.42% 13,834 32.18% 173 0.40%
1952 27,837 64.64% 15,183 35.26% 45 0.10%
1948 17,068 50.66% 16,150 47.93% 474 1.41%
1944 18,477 52.23% 16,766 47.39% 133 0.38%
1940 20,141 53.15% 17,543 46.29% 214 0.56%
1936 14,693 43.56% 17,991 53.34% 1,045 3.10%
1932 16,825 56.07% 12,612 42.03% 571 1.90%
1928 21,497 70.75% 8,726 28.72% 161 0.53%
1924 14,815 60.92% 1,453 5.97% 8,052 33.11%
1920 16,152 83.53% 2,447 12.65% 738 3.82%
1916 7,011 61.09% 4,015 34.98% 451 3.93%
1912 4,276 43.21% 3,032 30.64% 2,587 26.14%
1908 7,839 66.81% 3,227 27.50% 668 5.69%
1904 7,972 71.65% 2,348 21.10% 807 7.25%
1900 8,249 69.97% 3,094 26.24% 447 3.79%
1896 8,282 67.46% 3,655 29.77% 340 2.77%
1892 6,052 55.24% 4,231 38.62% 673 6.14%

Education edit

School districts include:[14]

There is a state-operated school, Wisconsin School for the Blind and Visually Impaired.

Tree cities edit

  • Beloit
  • Clinton
  • Edgerton
  • Evansville
  • Janesville
  • Milton

See also edit

References edit

  1. ^ a b c d "2020 Decennial Census: Rock County, Wisconsin". data.census.gov. U.S. Census Bureau. Retrieved July 3, 2022.
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. ^ . Wisconsin Atlas of Historical County Boundaries. The Newberry Library. 2007. Archived from the original on April 14, 2017. Retrieved August 15, 2015.
  4. ^ "Rock County, origin of place name" Dictionary of Wisconsin History.
  5. ^ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved August 8, 2015.
  6. ^ Great Wisconsin Birding & Nature Trail. Cook Memorial Arboretum.
  7. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved August 8, 2015.
  8. ^ "Historical Census Browser". University of Virginia Library. Retrieved August 8, 2015.
  9. ^ Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved August 8, 2015.
  10. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Archived (PDF) from the original on October 9, 2022. Retrieved August 8, 2015.
  11. ^ . United States Census Bureau. Archived from the original on February 27, 2016. Retrieved January 23, 2014.
  12. ^ a b "U.S. Census website". United States Census Bureau. Retrieved May 14, 2011.
  13. ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved November 11, 2020.
  14. ^ "2020 census - school district reference map: Rock County, WI" (PDF). U.S. Census Bureau. Archived (PDF) from the original on October 9, 2022. Retrieved July 23, 2022. - Text list

Further reading edit

  • 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 edit

  • 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

42°40′N 89°04′W / 42.67°N 89.07°W / 42.67; -89.07

March 14, 2024
rock, county, wisconsin, rock, county, county, state, wisconsin, 2020, census, population, county, seat, janesville, rock, county, comprises, janesville, beloit, metropolitan, statistical, area, included, madison, janesville, beloit, combined, statistical, are. Rock County is a county in the U S state of Wisconsin As of the 2020 census the population was 163 687 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 Rock CountyCountyRock County CourthouseSealLocation within the U S state of WisconsinWisconsin s location within the U S Coordinates 42 40 N 89 04 W 42 67 N 89 07 W 42 67 89 07Country United StatesState WisconsinFounded1839Named forRock RiverSeatJanesvilleLargest cityJanesvilleArea Total726 sq mi 1 880 km2 Land718 sq mi 1 860 km2 Water8 0 sq mi 21 km2 1 1 Population 2020 1 Total163 687 Density230 sq mi 87 km2 Time zoneUTC 6 Central Summer DST UTC 5 CDT Congressional districts1st 2ndWebsitewww wbr co wbr rock wbr wi wbr us Contents 1 History 2 Geography 3 Transportation 3 1 Major highways 3 2 Railroads 3 3 Buses 3 4 Airport 4 Adjacent counties 5 Demographics 6 Communities 6 1 Cities 6 2 Villages 6 3 Towns 6 4 Census designated places 6 5 Unincorporated communities 6 6 Ghost towns neighborhoods 7 Politics 8 Education 9 Tree cities 10 See also 11 References 12 Further reading 13 External linksHistory editRock County was created 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 editAccording 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 editMajor highways edit nbsp Interstate 39 nbsp Interstate 43 nbsp Interstate 90 nbsp U S Highway 12 nbsp U S Highway 14 nbsp U S Highway 51 nbsp Highway 11 nbsp Highway 26 nbsp Highway 59 nbsp Highway 67 nbsp Highway 81 nbsp Highway 89 nbsp Highway 104 nbsp Highway 140 nbsp Highway 213 Railroads edit Canadian Pacific Union Pacific Wisconsin and Southern RailroadBuses edit Beloit Transit Janesville Transit System List of intercity bus stops in WisconsinAirport edit Southern Wisconsin Regional Airport KJVL serves Rock County and the surrounding communities Adjacent counties editGreen County west Dane County north Jefferson County northeast Walworth County east Boone County Illinois south Winnebago County Illinois southDemographics editHistorical population CensusPop Note 18401 701 185020 7501 119 9 186036 69076 8 187039 0306 4 188038 823 0 5 189043 22011 3 190051 20318 5 191055 5388 5 192066 15019 1 193074 20612 2 194080 1738 0 195092 77815 7 1960113 91322 8 1970131 97015 9 1980139 4205 6 1990139 5100 1 2000152 3079 2 2010160 3315 3 2020163 6872 1 U S Decennial Census 7 1790 1960 8 1900 1990 9 1990 2000 10 2010 11 2020 1 As of the census of 2020 1 the population was 163 687 The population density was 227 9 people per square mile 88 0 people km2 There were 70 068 housing units at an average density of 97 6 units per square mile 37 7 units km2 The racial makeup of the county was 81 3 White 5 1 Black or African American 1 3 Asian 0 5 Native American 4 6 from other races and 7 2 from two or more races Ethnically the population was 9 7 Hispanic or Latino of any race nbsp 2000 Census Age Pyramid for Rock County As of the census 12 of 2010 there were 160 331 people residing in the county As of the census 12 of 2000 were 152 307 people 58 617 households and 40 387 families residing in the county The population density was 211 people per square mile 81 people km2 there were 62 187 housing units at an average density of 86 units per square mile 33 units 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 editCities edit Beloit Brodhead mostly in Green County Edgerton partly in Dane County Evansville Janesville County seat MiltonVillages edit Clinton Orfordville FootvilleTowns edit Avon Beloit Bradford Center Clinton Fulton Harmony Janesville Johnstown La Prairie Lima Magnolia Milton Newark Plymouth Porter Rock Spring Valley Turtle Union Census designated places edit Fulton Hanover ShopiereUnincorporated communities edit Afton Anderson Avalon Avon Belcrest Bergen Cainville Center Charlie Bluff Cooksville Coopers Shores Crestview Emerald Grove Fairfield partial Foxhollow Indianford Johnstown Johnstown Center Koshkonong partial Leyden Lima Center Magnolia Mallwood Maple Beach Newark Newville Porters Stebbinsville Tiffany Union Victory Heights Ghost towns neighborhoods edit Fellows Jefferson Prairie SettlementPolitics editSince 1988 Rock County has consistently voted for the Democratic candidate in every Presidential election In 2016 Hillary Clinton carried the county by the smallest margin of victory since Michael Dukakis in 1988 United States presidential election results for Rock County Wisconsin 13 Year Republican Democratic Third partyNo No No 2020 37 138 43 51 46 658 54 66 1 564 1 83 2016 31 493 41 40 39 339 51 71 5 242 6 89 2012 30 517 37 82 49 219 61 00 954 1 18 2008 27 364 34 56 50 529 63 82 1 276 1 61 2004 33 151 41 19 46 598 57 90 730 0 91 2000 27 467 39 01 40 472 57 49 2 465 3 50 1996 20 096 33 32 32 450 53 80 7 774 12 89 1992 21 942 31 79 31 154 45 13 15 929 23 08 1988 28 178 48 43 29 576 50 83 434 0 75 1984 32 491 54 76 26 433 44 55 410 0 69 1980 30 960 50 60 24 740 40 44 5 482 8 96 1976 28 325 49 04 28 048 48 56 1 389 2 40 1972 30 361 58 03 21 033 40 20 925 1 77 1968 25 229 50 97 20 567 41 56 3 697 7 47 1964 20 372 41 85 28 257 58 04 55 0 11 1960 29 675 60 63 19 194 39 22 76 0 16 1956 28 980 67 42 13 834 32 18 173 0 40 1952 27 837 64 64 15 183 35 26 45 0 10 1948 17 068 50 66 16 150 47 93 474 1 41 1944 18 477 52 23 16 766 47 39 133 0 38 1940 20 141 53 15 17 543 46 29 214 0 56 1936 14 693 43 56 17 991 53 34 1 045 3 10 1932 16 825 56 07 12 612 42 03 571 1 90 1928 21 497 70 75 8 726 28 72 161 0 53 1924 14 815 60 92 1 453 5 97 8 052 33 11 1920 16 152 83 53 2 447 12 65 738 3 82 1916 7 011 61 09 4 015 34 98 451 3 93 1912 4 276 43 21 3 032 30 64 2 587 26 14 1908 7 839 66 81 3 227 27 50 668 5 69 1904 7 972 71 65 2 348 21 10 807 7 25 1900 8 249 69 97 3 094 26 24 447 3 79 1896 8 282 67 46 3 655 29 77 340 2 77 1892 6 052 55 24 4 231 38 62 673 6 14 Education editSchool districts include 14 Albany School District Beloit School District Beloit Turner School District Brodhead School District Clinton Community School District Delavan Darien School District Edgerton School District Evansville Community School District Fort Atkinson School District Janesville School District Milton School District Oregon School District Parkview School District Stoughton Area School District Whitewater School District There is a state operated school Wisconsin School for the Blind and Visually Impaired Tree cities editBeloit Clinton Edgerton Evansville Janesville MiltonSee also editNational Register of Historic Places listings in Rock County WisconsinReferences edit a b c d 2020 Decennial Census Rock County Wisconsin data census gov U S Census Bureau Retrieved July 3 2022 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 amp Nature Trail Cook Memorial Arboretum 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 Archived PDF from the original on October 9 2022 Retrieved August 8 2015 State amp County QuickFacts United States Census Bureau Archived from the original on February 27 2016 Retrieved January 23 2014 a b 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 2020 census school district reference map Rock County WI PDF U S Census Bureau Archived PDF from the original on October 9 2022 Retrieved July 23 2022 Text listFurther reading editBrown 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 amp 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 3External links editRock 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 42 40 N 89 04 W 42 67 N 89 07 W 42 67 89 07 Retrieved from https en wikipedia org w index php title Rock County Wisconsin amp oldid 1178188777, wikipedia, wiki, book, books, library,

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