Lake Mills, Wisconsin Demographics & Population 2026
During the 2020–2024 ACS period, Lake Mills, Wisconsin had a total population of 6,470, the 136th largest city in Wisconsin, with a median household income of $91,027, which is 17% higher than the state average. The poverty rate is 5.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- 45.4% of adults hold a bachelor's degree or higher — top 10% in Wisconsin.
- Near full employment with an unemployment rate of just 2.4%.
Lake Mills Quick Facts
How Lake Mills Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 6,391 | 6,470 | +1.2% |
| Median household income | $87,039 | $91,027 | +4.6% |
| Median home value | $282,400 | $317,100 | +12.3% |
How Lake Mills Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 37 | National average: 61
Education
Educational Attainment (Adults 25+)
Lake Mills Rankings in Wisconsin
Explore Wisconsin Rankings
Other Cities in Jefferson County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Fort Atkinson | 12,463 | $79,302 | 6.7% | $211,800 |
| Jefferson | 7,732 | $79,006 | 11.2% | $225,600 |
| Waterloo | 3,600 | $87,776 | 13.7% | $230,600 |
| Johnson Creek | 3,362 | $100,685 | 4.3% | $314,200 |
| Ixonia | 2,684 | $93,359 | 1.0% | $345,300 |
| Palmyra | 2,195 | $86,058 | 11.4% | $213,100 |
| Lake Ripley | 1,932 | $116,179 | 10.1% | $366,300 |
| Lake Koshkonong | 1,010 | $97,115 | 5.8% | $370,300 |
| Sullivan | 663 | $71,250 | 27.2% | $257,400 |
| Rome | 620 | $92,083 | 4.7% | $326,200 |
Cities Similar to Lake Mills
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Twin Lakes | 6,309 | $86,222 | $270,700 | 23.4% | 6.0% |
| Sturtevant | 6,772 | $92,647 | $253,800 | 24.8% | 7.4% |
| Slinger | 6,307 | $101,404 | $367,000 | 38.0% | 2.9% |
| Delafield | 7,202 | $94,806 | $555,800 | 60.3% | 5.7% |
| Rib Mountain | 7,289 | $94,294 | $255,900 | 43.3% | 3.6% |
Population Overview
Lake Mills is a small city located in Wisconsin, within Jefferson County. The total population is 6,470. It ranks as the 136th most populous out of 808 Census-designated places in Wisconsin.
Age Demographics
The median age in Lake Mills is 40.3 years. This is about the same as the state median of 40.2 years.
Economy, Income & Housing
The median household income in Lake Mills is $91,027. This is 17% higher than the state median of $77,485. It is also 13% higher than the national median of $80,734. The poverty rate stands at 5.1%. This is 52% lower than the state poverty rate of 10.5%. The unemployment rate is 2.4%. This is 28% lower than the state rate of 3.3%. The median home value is $317,100. Housing costs are 19% higher than the state median of $266,500. The home-value-to-income ratio is 3.5x. 66.9% of occupied housing units are owner-occupied. This homeownership rate is 1% lower than the state average of 67.8%.
Race & Ethnicity
Lake Mills has a predominantly White (non-Hispanic) population, comprising 87.9% of all residents. Hispanic or Latino residents account for 8.6%. The Black or African American population (1.0%) is well below the state average of 5.9%. The Asian population (0.5%) is well below the state average of 2.9%.
Education
45.4% of residents aged 25 and older hold a bachelor's degree or higher. This places Lake Mills in the top 10% of all cities in the state for educational attainment. This is 36% higher than the state rate of 33.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.9%. Notably, 15.5% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Lake Mills, Wisconsin is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Wisconsin state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 808 Census-designated places in Wisconsin. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Lake Mills, Wisconsin?
Lake Mills, Wisconsin has a population of 6,470 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Lake Mills, WI?
The median household income in Lake Mills is $91,027, which is 13% higher than the national median of $80,734.
What is the poverty rate in Lake Mills, WI?
The poverty rate in Lake Mills is 5.1%. This means approximately 327 residents live below the federal poverty line.
What is the racial makeup of Lake Mills, Wisconsin?
Lake Mills's population is 87.9% White, 1.0% Black, 8.6% Hispanic/Latino, and 0.5% Asian.
What is the median home value in Lake Mills, WI?
The median home value in Lake Mills is $317,100. The home-value-to-income ratio is 3.5x.
How educated is Lake Mills, Wisconsin?
45.4% of adults (25+) in Lake Mills hold a bachelor's degree or higher, and 15.5% hold a graduate or professional degree.