Jefferson County, Wisconsin

Explore Jefferson County (Click on picture) Jefferson County, created in 1836 from Milwaukee County, is named after Thomas Jefferson, third President of the United States. Located in southeast Wisconsin, the county seat is Jefferson.

Land Area	557.01 sq miles
Water Area	25.73 sq miles
Elevation	795 ft at Jefferson
Number of Lakes	35
Area in Lakes	3,770 acres (5.89 sq miles)
Rivers	Ashippun, Bark, Crawfish, Rock, Scuppernong
Major Watershed	Rock River
Geographical Province	Eastern Ridges and Lowlands
Natural Vegetation	East: mostly sugar maple, basswood, and elm. Southeast: area of black spruce, tamarack, and cedar. West: oak savanna. Northwest and southwest: small areas of prairie bluestem and composites. West-central: small area of sedge meadow.
Population
1930: 1970: 1980: 1990: 2000:	36,785 60,060 66,152 67,783 74,021
Border Counties
North: East: South: West:	Dodge County Waukesha County Rock County, Walworth County Dane County

Jefferson County Government and Local Information Resources
County Web Site	www.co.jefferson.wi.us
Board of Supervisors	Board of Supervisors
County Clerk	Office of the County Clerk 320 S Main St Jefferson, WI 53549-1799	Phone: 920-674-7140
Clerk of Courts	Clerk of Circuit Courts 320 S Main St Jefferson, WI 53549-1799	Phone: 920-674-7150
County Sheriff	Sheriff 411 S Center Ave Jefferson, WI 53549	Phone: 920-674-7310
Health Department	Health Department N3995 Annex Road Jefferson, WI 53549	Phone: 920-674-7275
Highway Department	Highway Department 141 W Woolcock St Jefferson WI 53549	Phone: 920-674-7390
County Parks	Parks Department 320 S Main St, Rm 212 Jefferson, WI 53549	Phone: 920-674-7260
Birth & Death Certificates, Marriage Records	Register of Deeds 320 S Main St Jefferson, WI 53549-1799	Phone: 920-674-7235
Cooperative Extension	UW-Extension, Jefferson County 864 Collins Rd Jefferson, WI 53549	Phone: 920 674-7295
Tourism, Relocation & Business Development	Fort Atkinson Area Chamber of Commerce 244 N Main St Fort Atkinson, WI 53538-1829	Phone: 920-563-3210
	Jefferson Chamber of Commerce 122 W Garland Street Jefferson, WI 53549	Phone: 920-674-4511
	Johnson Creek Area Chamber of Commerce PO Box 527 Johnson Creek, WI 53038-0527	Phone: 920-699-4949
	Lake Mills Area Chamber of Commerce 200C Water St Lake Mills, WI 53551-1632	Phone: 920-648-3585 E-mail
	Palmyra Area Chamber of Commerce PO Box 139 Palmyra, WI 53156-0139	Phone: 414-531-4357
	Waterloo Chamber of Commerce PO Box 1 117 E Madison Street Waterloo, WI 53594-0001	Phone: 920-478-2500
	Watertown Area Chamber of Commerce 519 E Main St Watertown, WI 53094-3873	Phone: 920-261-6320
Historical and Genealogical Societies	Bark River Woods Historical Society W4080 St Rd 106 Fort Atkinson, WI 53538-9681	Phone: 920-563-4773
	Concord Historical Society PO Box 561 Watertown, WI 53094	E-mail
	Dodge/ Jefferson County Genealogical Society PO Box 91 Watertown, WI 53094	E-mail
	Fort Atkinson Historical Society 407 Merchants Ave Fort Atkinson, WI 53538	Phone: 920-563-7769 E-mail
	Heritage Military Music Foundation 504 S 4th St Watertown, WI 53094	Phone: 920-262-1864 E-mail
	Jefferson Historical Society 317 South Main Street Jefferson, WI 53549	Phone: 920-674-7731
	Johnson Creek Historical Society PO Box 113 Johnson Creek, WI 53038	E-mail
	Lake Mills/Aztalan Historical Society PO Box 122 Lake Mills, WI 53551	Phone: 920-648-8575
	Palmyra Historical Society 226 W Main St Palmyra, WI 53156	Phone: 414-495-4245
	Waterloo Area Historical Society PO Box 52 Waterloo, WI 53594	Phone: 920-478-2328
	Watertown Historical Society 701 S Tenth St Watertown, WI 53094-4833	Phone: 920-261-0275
	WIGenWebProject, Jefferson County