Jefferson   County WI United States

County FIPS 55055
Largest City Watertown
State Wisconsin
Latitude 43.0208
Longitude -88.7759
Population 86,003
Density 154.59 people per square mile
Time Zone America/Chicago
  • All demographic data comes from the 2024 American Community Survey (5-year study).
  • Learn more about each field.
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Household Income

Median household: $83,750
Median individual: $42,605

Race

Mode: 88.6% White

Gender

 50.0% female 

Rent

  $1035 / month  

Median house value: $272,514.0

Age

Median: 41.5 years old

Education

With at least college degree: 28.6%
With STEM degree: 38.9%

Marital Status

 50.3% married 

Never married: 32.0%

Labor Force Participation

 68.3% working 

Unemployed: 3.6%

Average Family Size

 2.98 people 

Commute Time

 24.8 minutes 

Health Care

 4.8% uninsured 

Poverty

 8.1%

All data comes from the SimpleMaps US Counties Database, 2026.

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