Ideally situated between the metropolitan areas of Milwaukee and Madison, Jefferson County boasts rich agricultural areas and a diversified manufacturing industry. Home to the national headquarters of Trek Bicycle, Jefferson County simmers with outdoor recreation opportunities. Each of the county’s communities exhibit a strong local character with thriving town centers serving residents at work and at play.

2010 Population: 83,683
2015 Population Estimate: 84,559

Demographics of Jefferson County

Top private-sector employers in Jefferson County include Trek Bicycle, Nasco International, Spacesaver Corp, and Generac Power Systems, Inc.

Jefferson County Major Employers

  • Watertown: 23,864
  • Whitewater: 14,579
  • Fort Atkinson: 12,355
  • Jefferson (county seat): 7,914
  • Lake Mills: 5,840
  • Ixonia: 4,670
  • Koshkonong: 3,694
  • Waterloo: 3,330
  • Oakland: 3,088
  • Johnson Creek: 2,908

Thrive Economic Development for Jefferson & Dodge Counties
Victoria Pratt, President, Thrive Economic Development
920.674.8710 | Email Victoria

Download the Jefferson County Profile to learn more.

Sources: U.S. Census; Wisconsin’s WORKnet; Municipality Population Estimates, Wisconsin Department of Administration, Demographic Services Center; Applied Geographic Solutions via LocateInWisconsin.