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Rock County, Wisconsin

Explore Rock County (Click on picture) Rock county, created in 1836 as a territorial county, is named for the Rock River. Located in southeast Wisconsin, the county seat is Janesville.

Land Area	720.47 sq miles
Water Area	5.73 sq miles
Elevation	858 ft at Janesville
Number of Lakes	76
Area in Lakes	11,174 acres (17.46 sq miles)
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 Janesvill, WI 53545	Phone: 608-757-5660
Clerk of Courts	Clerk of Circuit Courts 51 S Main St Janesvill, 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 Janesvill, 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 Chamber of Commerce PO Box 51 Evansville, WI 53536-0051	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 1003 Pleasant St Beloit, WI 53511-4449	Phone: 608-365-4838 Toll Free: 800-4-BELOIT E-mail
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