Rock County

Wisconsin – Rock County


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County population

Year Population
1980. 136458
1990. 139510
2000. 152307
2010. 160331




County seat is in Janesville
Founded in 1836
Area: 720 square miles
County board has 29 members
FIPS code: 55105

Zipcodes in Rock County: 53563, 53501, 53512, 53576, 53542, 53546, 53547, 53537, 53548, 53536, 53505, 53534, 53511, 53545, 53525

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Profile ID: LFUS-COU-O-27

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.