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 2025 population of 892. Lake Madison is currently growing at a rate of 1.59% annually and its population has increased by 9.99% since the most recent census, which recorded a population of 811 in 2020.

The average household income in Lake Madison is $198,189 with a poverty rate of 12.88%. The median age in Lake Madison is 61.3 years: 61.8 years for males, and 60.2 years for females.

Demographics

The racial composition of Lake Madison includes 80% White, 8.59% Native American, and smaller percentages for Black or African American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Native American

Black or African American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	708	80%
Two or more races	101	11.41%
Native American	76	8.59%
Black or African American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Lake Madison Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Lake Madison's average per capita income is $36,875. Household income levels show a median of $116,648. The poverty rate stands at 12.88%.

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	$127,500	-
Families	$121,827	$228,603
Households	$116,648	$198,189
Non Families	$87,500	$118,106

$36,875

Average Income

$116,648

Median Household Income

12.88%

Poverty Rate