Lake Koshkonong, Wisconsin Demographics & Population 2026
During the 2020–2024 ACS period, Lake Koshkonong, Wisconsin had a total population of 1,010, the 395th largest community in Wisconsin, with a median household income of $97,115, which is 25% higher than the state average. The poverty rate is 5.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Near full employment with an unemployment rate of just 1.3%.
Lake Koshkonong Quick Facts
How Lake Koshkonong 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 | 983 | 1,010 | +2.7% |
| Median household income | $93,125 | $97,115 | +4.3% |
| Median home value | $334,300 | $370,300 | +10.8% |
How Lake Koshkonong 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 Koshkonong 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 |
| Lake Mills | 6,470 | $91,027 | 5.1% | $317,100 |
| 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 |
| Sullivan | 663 | $71,250 | 27.2% | $257,400 |
| Rome | 620 | $92,083 | 4.7% | $326,200 |
Cities Similar to Lake Koshkonong
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Eagle Lake | 1,037 | $95,625 | $271,400 | 34.9% | 3.6% |
| Kekoskee | 1,067 | $96,944 | $305,100 | 25.3% | 5.7% |
| Hingham | 960 | $98,571 | $257,700 | 32.7% | 2.6% |
| Arlington | 946 | $98,750 | $291,600 | 23.6% | 2.3% |
| Elkhart Lake | 1,092 | $94,250 | $328,300 | 50.5% | 6.3% |
Population Overview
Lake Koshkonong is a small community located in Wisconsin, within Jefferson County. The total population is 1,010. It ranks as the 395th most populous out of 808 Census-designated places in Wisconsin.
Age Demographics
The median age in Lake Koshkonong is 54.0 years. This is 34% higher than the state median of 40.2 years. 13.2% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Lake Koshkonong is $97,115. This is 25% higher than the state median of $77,485. It is also 20% higher than the national median of $80,734. The poverty rate stands at 5.8%. This is 45% lower than the state poverty rate of 10.5%. The unemployment rate is 1.3%. This is 62% lower than the state rate of 3.3%. The median home value is $370,300. Housing costs are 39% higher than the state median of $266,500. The home-value-to-income ratio is 3.8x. 90.4% of occupied housing units are owner-occupied. This homeownership rate is 33% higher than the state average of 67.8%.
Race & Ethnicity
Lake Koshkonong has a predominantly White (non-Hispanic) population, comprising 93.8% of all residents. Hispanic or Latino residents account for 2.8%. The Black or African American population (0.9%) is well below the state average of 5.9%. The Hispanic or Latino population (2.8%) is well below the state average of 8.0%. The Asian population (0.5%) is well below the state average of 2.9%.
Education
27.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 19% lower 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 97.0%.
Data Sources & Methodology
All demographic data for Lake Koshkonong, 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.
Free data download: Get all Wisconsin city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Lake Koshkonong, Wisconsin?
Lake Koshkonong, Wisconsin has a population of 1,010 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Lake Koshkonong, WI?
The median household income in Lake Koshkonong is $97,115, which is 20% higher than the national median of $80,734.
What is the poverty rate in Lake Koshkonong, WI?
The poverty rate in Lake Koshkonong is 5.8%. This means approximately 59 residents live below the federal poverty line.
What is the racial makeup of Lake Koshkonong, Wisconsin?
Lake Koshkonong's population is 93.8% White, 0.9% Black, 2.8% Hispanic/Latino, and 0.5% Asian.
What is the median home value in Lake Koshkonong, WI?
The median home value in Lake Koshkonong is $370,300. The home-value-to-income ratio is 3.8x.
How educated is Lake Koshkonong, Wisconsin?
27.2% of adults (25+) in Lake Koshkonong hold a bachelor's degree or higher, and 9.3% hold a graduate or professional degree.