Lake Madison Flag

Lake Madison

County:
Lake County
County Seat:
No
Area (mi²):
4.721
State:
South Dakota

Lake Madison is a CDP located in Lake County, South Dakota. Lake Madison has a 2026 population of 932. Lake Madison is currently growing at a rate of 1.75% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median household income in Lake Madison is $129,191 with a poverty rate of 0.96%. The median age in Lake Madison is 63.2 years: 62.8 years for males, and 64.2 years for females. For every 100 females there are 126.6 males.

932
Total Population
197
Density (mi²)
16 1.75%
Growth

Lake Madison Population

Lake Madison Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026932161.75%
2025916151.66%

Median Age

Overall: 63.2 years
Female: 64.2 years
Male: 62.8 years

Lake Madison Adults

There are 838 adults, (354 of whom are seniors) in Lake Madison.

Sex Ratio

Female: 413 (44.1%)
Male: 523 (55.9%)

Demographics

The racial composition of Lake Madison includes 88.89% White, 6.73% Native American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White83288.89%
Native American636.73%
Two or more races414.38%
Race
Population ↓
Percentage (of total)
White83288.89%
Native American636.73%
Two or more races414.38%

Lake Madison Marital Status

Economics and Income Statistics

Lake Madison 's average per capita income is $60,938. Household income levels show a median of $129,191. The poverty rate stands at 0.96%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$144,875-
Families$138,750$285,590
Households$129,191$236,969
Non Families-$132,299

$60,938

Average Income

$129,191

Median Household Income

0.96%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)