Rock County, Wisconsin

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
Rock County Courthouse
Location within the U.S. state of Wisconsin
Wisconsin's location within the U.S.
Coordinates: 42°40′N 89°04′W
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
 (2010)
  Total160,331
  Estimate 
(2018)
163,129
  Density220/sq mi (85/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional districts1st, 2nd
Websitewww.co.rock.wi.us

References

  1. "State & County QuickFacts". United States Census Bureau. Archived from the original on July 17, 2011. Retrieved January 23, 2014.
  2. "Find a County". National Association of Counties. Retrieved June 7, 2011.
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