County
· Wisconsin
Rock County
Rock County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 163,687. Its county seat is Janesville. Rock County comprises the Janesville–Beloit metropolitan statistical area and is included in the Madison–Janesville–Beloit combined statistical area.
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Cities and towns 8
Townships 20
- Town of Avon pop. 582
- Town of Beloit pop. 7,822
- Town of Bradford pop. 1,015
- Town of Center pop. 1,058
- Town of Clinton pop. 910
- Town of Fulton pop. 3,627
- Town of Harmony pop. 2,574
- Town of Janesville pop. 3,725
- Town of Johnstown pop. 770
- Town of La Prairie pop. 792
- Town of Lima pop. 1,282
- Town of Magnolia pop. 753
- Town of Milton pop. 3,110
- Town of Newark pop. 1,527
- Town of Plymouth pop. 1,244
- Town of Porter pop. 984
- Town of Rock pop. 2,984
- Town of Spring Valley pop. 735
- Town of Turtle pop. 2,411
- Town of Union pop. 2,109
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 177072
- FIPS state
- 55
- FIPS county
- 105
- FIPS place
- 99105
- Census record name
- COUNTY OF ROCK
- Mailing address
- 51 S MAIN ST, JANESVILLE 53545