Rock County, Wisconsin

county in Wisconsin, United States

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
Rock County Courthouse
Map of Wisconsin highlighting Rock County
Location within the U.S. state of Wisconsin
Map of the United States highlighting 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
 (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

ReferencesEdit

  1. "State & County QuickFacts". United States Census Bureau. Retrieved January 23, 2014.
  2. "Find a County". National Association of Counties. Retrieved June 7, 2011.