Jefferson County, Wisconsin
Jefferson County, Wisconsin · ZIP 53036, 53038, 53066
- Census data · ACS 2019-2023
- 86,245 (2024 estimate)Population
- 34,455Households
- $80,604Median household income
- $253,800Median home value
- 30Towns with a page
- 14ZIP codes
Jefferson County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 74,021 |
| 2010 | 83,686 |
| 2020 | 84,900 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 55, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 55, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 55, retrieved November 14, 2026.
Median household income $80,604 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 55, retrieved November 14, 2026.
- Owner occupied
- 25,124 units
- Renter occupied
- 9,331 units
- Vacancy rate
- 6%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 55, retrieved November 14, 2026.
31,584 employees in 2,058 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 55, retrieved November 14, 2026.
| Measure | Jefferson County | Wisconsin |
|---|---|---|
| Population | 85,867 | 5,892,023 |
| Median household income | $80,604 | $75,670 |
| Median age | 41.3 | 40.1 |
| Median home value | $253,800 | $247,400 |
| Bachelor’s degree or higher | 28.1% | 32.8% |
| Foreign-born residents | 3.5% | 5.1% |
| Owner-occupied homes | 72.9% | 67.9% |
| Mean commute to work | 24.9 minutes | 22.2 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 55, retrieved November 14, 2026.
Townships, towns and villages in Jefferson County30 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Watertown | City | 22,617 | 12.2 sq mi |
| Fort Atkinson | City | 12,377 | 5.85 sq mi |
| Jefferson | City | 7,766 | 5.83 sq mi |
| Lake Mills | City | 6,617 | 4.18 sq mi |
| Ixonia Town | Town | 5,067 | 35.8 sq mi |
| Koshkonong Town | Town | 3,769 | 41.2 sq mi |
| Waterloo | City | 3,611 | 3.79 sq mi |
| Johnson Creek | Village | 3,398 | 3.03 sq mi |
| Oakland Town | Town | 3,220 | 34.6 sq mi |
| Ixonia | Census designated place | 2,470 | 3.64 sq mi |
| Sullivan Town | Town | 2,308 | 34.9 sq mi |
| Lake Mills Town | Town | 2,204 | 30.3 sq mi |
| Jefferson Town | Town | 2,054 | 42.5 sq mi |
| Lake Ripley | Census designated place | 1,972 | 3.34 sq mi |
| Concord Town | Town | 1,961 | 35.7 sq mi |
| Watertown Town | Town | 1,940 | 37.4 sq mi |
| Palmyra | Village | 1,719 | 2.29 sq mi |
| Farmington Town | Town | 1,395 | 35.1 sq mi |
| Aztalan Town | Town | 1,364 | 24.1 sq mi |
| Palmyra Town | Town | 1,210 | 33.6 sq mi |
| Milford Town | Town | 1,097 | 33.8 sq mi |
| Hebron Town | Town | 1,044 | 28.9 sq mi |
| Lake Koshkonong | Census designated place | 983 | 14.1 sq mi |
| Waterloo Town | Town | 873 | 32.3 sq mi |
| Sumner Town | Town | 824 | 16.3 sq mi |
| Cold Spring Town | Town | 730 | 22.5 sq mi |
| Sullivan | Village | 653 | 1.14 sq mi |
| Rome | Census designated place | 609 | 3.71 sq mi |
| Hebron | Census designated place | 381 | 2.46 sq mi |
| Helenville | Census designated place | 119 | 0.55 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 55 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across Jefferson County
No job is posted in Jefferson County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in Jefferson County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Dane CountyPopulation 588,347 (2024 estimate)
- Dodge CountyPopulation 88,635 (2024 estimate)
- Rock CountyPopulation 165,461 (2024 estimate)
- Walworth CountyPopulation 106,029 (2024 estimate)
- Waukesha CountyPopulation 417,029 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 55, retrieved November 14, 2026.