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Rock County, Wisconsin

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 •  County Government  •  Tourism - Business  •  Historical Societies  •  Public Libraries

Explore Rock County Explore Rock County (Click on picture)

Rock county, created in 1836 as a territorial county, "took its name from the " big rock " on the north side of the river, now within the limits of the city of Janesville, which had been for years one of the recognized land-marks of the country to the Indians, the traders, and later to the settlers, as indicating a point where the river might be safely forded.1" Located in southeast Wisconsin, the county seat is Janesville.

Land Area 720.47 sq miles Click for Janesville, Wisconsin Forecast
Water Area 5.73 sq miles
Elevation 858 ft at Janesville
Number of Lakes 75
Area in Lakes 11,159 acres
Rivers Rock, Sugar, Yahara
Major Watershed Rock River
Geographical Province North and east: Eastern Ridges and Lowlands. Central and southwest: Western Upland.
Natural Vegetation Bur oak, white oak, and bluestem throughout. South, central, west-central, and north-central: areas of sugar maple. Northwest: narrow strip of white, black, and red oak. Southeast corner: willow, soft maple, and ash.
Population  
1930:
1970:
1980:
1990:
2000:
74,206
131,970
139,420
139,510
152,307
 
Border Counties  
North:
East:
South:
West:
Dane County, Jefferson County
Walworth County
Illinois
Green County

Rock County Government and Local Information Resources
County Government Web Site www.co.rock.wi.us
County Administrator County Administrator
51 S. Main St.
Janesville, WI 53545
Phone: 608-757-5510
Board of Supervisors Board of Supervisors
51 S. Main St.
Janesville, WI 53545
Phone: 608-757-5540
County Clerk Office of the County Clerk
51 S Main St
Janesville, WI 53545
Phone: 608-757-5660
Clerk of Courts Clerk of Circuit Courts
51 S Main St
Janesville, WI 53545
Phone: 608-743-2200
County Sheriff Sheriff
200 Hwy 14 E
Janesville, WI
Phone: 608-757-7946
Health Department Public Health Department
3328 Hwy 51 N
Janesville, WI
Phone: 608-757-5440
Highway Department Highway Division, DPW
3715 Newville Rd.
Janesville
Phone: 608-757-5450
County Parks Parks Division, DPW
3715 Newville Road
Janesville, WI 53545
Phone: 608-757-5450
Birth & Death Certificates, Marriage Records Register of Deeds
51 S Main St
Janesville, WI 53545
Phone: 608-757-5656
Cooperative Extension UW-Extension, Rock County
51 S Main St
Janesville, WI 53545
Phone: 608-757-5696
E-mail

Tourism, Relocation & Business Development Edgerton Area Chamber of Commerce
PO Box 5
Edgerton, WI 53534
Phone: 608-884-4408
  Evansville Area Chamber of Commerce & Tourism
8 W Main St
Evansville, WI 53536
Phone: 608-882-5131
  Forward Janesville, Inc.
51 S Jackson St
Janesville, WI 53545-3839
Phone: 608-757-3160
  Greater Beloit Chamber of Commerce
500 Public Ave
Beloit, WI 53511
Phone: 608-365-8835
  Janesville Area Convention & Visitors Bureau
51 S Jackson St
Janesville, WI 53545
Phone: 608-757-3171
  Milton Area Chamber of Commerce
PO Box 222
Milton, WI 53563-0222
Phone: 608-868-6222
  Orfordville/Footville Chamber of Commerce
PO Box 182
Orfordville, WI 53576-0182

  Visit Beloit
500 Public Ave
Beloit, WI 53511
Phone: 608-365-4838
Toll Free: 800-4-BELOIT

Historical and Genealogical Societies Beloit Historical Society
845 Hackett St
Beloit, WI 53511
Phone: 608-365-7835
E-mail
  Clinton Community Historical Society
PO Box 606
Clinton, WI 53525
Phone: 608-676-4940
  Evansville Grove Society
PO Box 234
Evansville, WI 53536
Phone: 608-882-6939
  Milton Historical Society
PO Box 245
Milton, WI 53563
Phone: 608-868-2930
E-mail
  Rock County Genealogical Society
PO Box 711
Janesville, WI 53547-0711
Phone: 608-752-5891
  Rock County Historical Society
PO Box 8096
Janesville, WI 53547-8096
Phone: 608-756-4509
E-mail
  Sterling North Society
409 W Rollin St
Edgerton, WI 53534
Phone: 608-884-7589
Or: 608-884-3731
E-mail
  WIGenWebProject, Rock County

Rock County - Arrowhead Library System www.als.lib.wi.us
Beloit Public Library
409 Pleasant St
Beloit 53511
608-364-2905

Clinton Public Library
214 Mill Street
Clinton 53525
608-676-5569
Eager Free Public Library
39 W Main Street
Evansville 53536
608-882-2275

Edgerton Public Library
101 Albion Street
Edgerton 53534
608-884-4511
Hedberg Public Library
316 S Main Street
Janesville 53545
608-758-6588

Milton Public Library
430 E High Street
Milton 53563
608-868-7462
Orfordville Public Library
203 W Beloit Street
Orfordville 53576
608-879-9229

1The History Of Rock County, Wisconsin: by Western Historical Company, Chicago, pub
Notes
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