Welcome to Jefferson ...

The city of Jefferson is located in Jefferson County<1> and is the County Seat for Jefferson County.

The location of Jefferson has been provided by the Geographic Names Information System (ie- the GNIS).<2>

While we don't have a date for the founding of Jefferson, you might consider that their post office opened  in 1846.

From the  Census Estimates for 2019, Jefferson has a population of 7,993 people<3> (see below for details).

Jefferson is 790 feet [241 m] above sea level.<4>.

Time Zone: Jefferson lies in the Central Time Zone (CST/CDT) and observes daylight saving time

Population Details ...

Taken from the 2019 Census Estimates, Jefferson had an population of 7,993 people. This is an increase of 0.25% since the 2010 Census (or an increase of 8.93% since the 2000 Census).

At the time of the 2010 Census, Jefferson had a population of 7,973 people (or 9.53% of the total population of Jefferson County). This makes Jefferson the county's 3rd most populous community.

The population of Jefferson represents 0.14% of the total population of Wisconsin (which has 5,686,986 people), making it the state's 117th most populous community.

With a 2010 count of 7,973 people, the population of Jefferson increased 8.65% from the 2000 Census (which had a count of 7,338 people).

More information can be found on the Census Page for Jefferson.

Communities Also Named Jefferson ...

Using our Gazetteer, we found that there are 58 communities that are also named Jefferson - they are located in Alabama (2), Arkansas (2), California, Colorado (2), Georgia (3), Illinois, Indiana, Iowa, Kansas (3), Louisiana (2), Maine, Maryland, Massachusetts, Michigan (4), Mississippi (2), Montana, Nevada, New Hampshire, New Jersey, New York (2), North Carolina, Nova Scotia, Ohio (5), Oklahoma, Ontario, Oregon, Pennsylvania (5), South Carolina, South Dakota, Tennessee (2), Texas, Virginia (2), Washington and West Virginia (2).

For more information, see our Tidbits & Trivia Page for Jefferson.

Communities near Jefferson ...

We have created a list of 10 communities that are near Jefferson.

• Watertown
  (13 miles [20.9 km] to the north)
  • Jump to our Gazetteer entry for Watertown
  • Watertown is located in Jefferson County
  • Population from the 2020 Census: 23,370 people
• Oconomowoc
  (17 miles [27.4 km] to the northeast)
  • Note: The GPS coordinates that we are using for Oconomowoc have been provided by the GNIS.<2> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Oconomowoc
  • Oconomowoc is located in Waukesha County
  • Population from the 2020 Census: 17,160 people
• Whitewater
  (12 miles [19.3 km] to the south)
  • Jump to our Gazetteer entry for Whitewater
  • Whitewater is located in Walworth County
  • Population from the 2020 Census: 14,993 people
• Lake Mills
  (6 miles [9.7 km] to the northwest)
  • Note: The GPS coordinates that we are using for Lake Mills have been provided by the GNIS.<2> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Lake Mills
  • Lake Mills is located in Jefferson County
  • Population from the 2020 Census: 6,014 people
• Milton
  (17 miles [27.4 km] to the southwest)
  • Jump to our Gazetteer entry for Milton
  • Milton is located in Rock County
  • Population from the 2020 Census: 5,643 people
• Edgerton
  (17 miles [27.4 km] to the southwest)
  • Jump to our Gazetteer entry for Edgerton
  • Edgerton is located in Rock County
  • Population from the 2020 Census: 5,595 people
• Summit
  (16 miles [25.7 km] to the east)
  • Jump to our Gazetteer entry for Summit
  • Summit is located in Waukesha County
  • Population from the 2020 Census: 5,255 people
• Marshall
  (17 miles [27.4 km] to the northwest)
  • Jump to our Gazetteer entry for Marshall
  • Marshall is located in Dane County
  • Population from the 2020 Census: 4,016 people
• Waterloo
  (15 miles [24.1 km] to the northwest)
  • Note: The GPS coordinates that we are using for Waterloo have been provided by the GNIS.<2> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Waterloo
  • Waterloo is located in Jefferson County
  • Population from the 2020 Census: 3,322 people
• Deerfield
  (13 miles [20.9 km] to the west)
  • Jump to our Gazetteer entry for Deerfield
  • Deerfield is located in Dane County
  • Population from the 2020 Census: 2,540 people

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Jefferson. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Jefferson.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Jefferson. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Jefferson.

We also have a detailed list of newspapers that have been published in the area around Jefferson. Our list includes 5 papers. See our Newspapers Page for Jefferson.

Adding Jefferson to Our Gazetteer ...

We originally found mention of Jefferson in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found for Jefferson was in the book titled U.S. Post Offices (Oct. 1846).

We also found Jefferson in the book titled Table of U.S. Post Offices in the United States (Jan. 1851).

For more details, see References and Mentions for Jefferson.

Off-the-Road Links ...

Unfortunately, we don't know of a website for Jefferson. If you can help, please contact us through our Feedback Page.

The official website for Jefferson County: www.jeffersoncountywi.gov

The official website for State of Wisconsin: https://www.wisconsin.gov/