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Jefferson County


Facts & Information

The Cities and communities of Jefferson County, Wisconsin *


Cold Spring, Concord

Farmington, Fort Atkinson

Hebron (Town), Hebron, Helenville


Jefferson, Johnson Creek (Village)


Lake Koshkonong, Lac La Belle, Lake Mills (Town), Lake Mills, Lake Ripley



Palmyra (Town), Palmyra


Sullivan (Town), Sullivan, Sumner

Waterloo, Watertown, Whitewater

*This list of cities may not be complete. The list may contain towns, cities, villages, boroughs, townships, ghost towns and other populated places.

If you have information about any of these unlinked communities or have a community not listed at all, please send it to us and we will add a page for that community. Some of these places above may only be neighborhoods or local area names and are not listed with the census at all or just included in a larger surrounding designated census area..

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Information & Facts about Jefferson County, Wisconsin

Jefferson County
is a county located in the U.S. state of Wisconsin. As of 2000, the population was 74,021. Its county seat is Jefferson.


Jefferson County official website

Jefferson County Courthouse
320 S Main St.
Jefferson, WI
Phone: 920-674-7101
County Clerk: Phone: 920-674-7140


1836 - 468
1930 - 36,785
1970 - 60,060
1980 - 66,152
1990 - 67,783
2000 - 74,021
2005 - 79,328

Housing Units
2000 - 30,092
2004 - 32,067

2000 - 28,205

Population Density
2000 - 133 persons per square mile

Racial Make-up
2000 - 96.34% White, 0.28% Black or African American, 0.34% Native American, 0.45% Asian, 0.02% Pacific Islander, 1.65% from other races and 0.93% from two or more races.

Average Household size: 2.55 persons (2000)
Average Family size: 3.02 persons (2000)


neighboring counties are:
Dodge County to the North and Waukesha County to the East. In the south are Rock County and Walworth County. To the west is Dane County

Jefferson, the county seat, is located 35 miles from Madison and 45 miles from Milwaukee. Interstate 94 is five miles to the north. U.S. Highway 18 and State Highway 26 intersect in the center of town.

Here is a location page for the county

Other Facts & Figures:

Per capita income:

1999 - $21,236
2002 - $28,805


This page has weather and climate information for the county. Try this current weather page for the county.

Average yearly snowfall: 37.6 inches
Average yearly precipitation: 33.1 inches


The county is named for Thomas Jefferson, third President of the United States.

The county was formed on 7 December 1836 from a portion of Milwaukee County. By 1838 Jefferson County was divided into four townships - Finch Precinct, Jefferson Precinct, Bark River and Watertown Precinct. The county seat was approved on 12 January 1838 as a site in the bend of the river below Jefferson. When the paperwork arrived there was a blank for the name, one of the commissioners, Capt. Robert Masters, filled it in with the name of Jefferson. The land was laid out into lots, some of which were sold to cover expenses. The county was finally fully organized in February 1839.

A history page for the county. Also try this history page.


Total Area: 583 square miles
Land Area: 557.00 square miles
Water Area: 26.00 square miles

Elevation at County Seat: 795 feet above sea level

The county has 35 lakes that cover approximately 5.89 square miles.

Major Rivers: Ashippun, Bark, Crawfish, Rock, Scuppenong

Geographic location: Eastern Ridges and Lowlands province


Birth & Death Certificates, Marriage Records
Register of Deeds
320 Main St
Jefferson, WI 53549-1799
Phone: 920-674-7235

Linkpendium Genealogy Site for Genealogy and Family History

Bark River Woods Historical Society
W4080 St Rd 106
Fort Atkinson, WI 53538-9681
Phone: 920-563-4773

Cemeteries of Jefferson County

Dodge/Jefferson Counties Genealogical Society
Heritage Hall
504 S Fourth
Watertown, WI
PO Box 91
Watertown, WI 53094

Fort Atkinson Historical Society
407 Merchants Ave
Fort Atkinson, WI 53538
Phone: 920-563-7769
Jefferson Historical Society
305 S Main
Jefferson, WI 53549
Phone: 920-674-2455

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


Jefferson Public Library
321 S. Main Street
Jefferson, WI 53549
Phone: (920) 674-7733
Fax: (920) 674-7735

Jefferson County - Mid-Wisconsin Federated Library System

Dwight Foster Public Library
102 E Milwaukee Avenue
Fort Atkinson 53538

Powers Memorial Library
115 Main Street
P.O. Box O
Palmyra 53156

Irvin L. Young Memorial Library
431 West Center Street
Whitewater 53190

Johnson Creek Public Library
125 Lincoln Street
Johnson Creek 53038

L. D. Fargo Public Libaray
120 E Madison Street
Lake Mills 53551


School District of Jefferson
206 South Taft Avenue
Jefferson, WI 53549
Phone: (920) 675-1000


In 2004 manufacturing was the largest of 20 major sectors. It had an average wage per job of $38,976. Per capita income grew by 22.3% between 1994 and 2004 (adjusted for inflation).

2002 Economic Census for Jefferson County

Jefferson County Economic Development Consortium
864 Collins Road, Suite 111
Jefferson, Wisconsin 53549
Phone (920) 674-8711

Organizations & Groups

Jefferson Area Chamber of Commerce
108 South Main Street
Jefferson, WI 53549
Phone: 920-674-4511

Council for the Performing Arts

Fort Atkinson Area Chamber of Commerce
244 N Main St
Fort Atkinson, WI 53538
Phone: 920-563-3210

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, Wisconsin 53551
Phone: 920-648-3585
Fax: 920-648-6751

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

Attractions & Other Information

Jefferson County Fair Park

Gemuetlichkeit Days - held each year in September

Jefferson County Area Visitors Guide

The Playland of Dreams, a children's playground, is located in Jefferson and is a great place for family entertainment.

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This page was last updated on 11 May 2009 at 9:18 pm

This page was created 4 January 1999

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