Lake Madison CDP, South Dakota Demographics & Population 2026

Name: Lake Madison CDP, South Dakota Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

As of 2026, Lake Madison CDP, South Dakota has a total population of 885, the 91st largest city in South Dakota, with a median household income of $116,648, which is 61% higher than the state average. The poverty rate is 12.9%.

Key Takeaways

Household income is 61% above the state average — one of the wealthiest communities in South Dakota.
48.5% of adults hold a bachelor's degree or higher — top 10% in South Dakota.

Lake Madison CDP Quick Facts

Population 885

Median Household Income $116,648

Median Home Value $496,600

Poverty Rate 12.9%

Unemployment Rate 3.3%

Median Age 61.3 years

Homeownership Rate 88.4%

Affordability Ratio 4.3x

Bachelor's Degree or Higher 48.5%

High School Graduation Rate 99.6%

Diversity Index 30/100

Population 885 91st of 439

Median Income $116,648 top 10%

Poverty Rate 12.9% 4% higher national

Median Home Value $496,600 top 10%

How Lake Madison CDP Compares

Median Household Income

Lake Madison CDP

$116,648

$72,421

National

$78,538

Median Home Value

Lake Madison CDP

$496,600

$236,800

National

$303,400

Economy & Housing

Household Income Distribution

Under $25K 9.2%

$25K-$50K 21.3%

$50K-$100K 10.4%

$100K+ 59.1%

Employment

3.3% Unemployment Rate State: 3.0% | National: 5.2%

57.9% Labor Force Participation

Housing Overview

Owner 88.4%

Renter 11.6%

Affordability Index Moderate

4.3x home value to income ratio

People & Demographics

Age Distribution

Under 18

17.3%

18-34

6.1%

35-54

13.1%

55-74

55.5%

75+

8.0%

Race & Ethnicity

Diversity Index

Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 33 | National average: 60

Education

Educational Attainment (Adults 25+)

Lake Madison CDP Rankings in South Dakota

#91 Population of 439

#16 Median Income of 439

#23 Education of 439

#6 Home Value of 439

Explore South Dakota Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Cities Similar to Lake Madison CDP

These cities in the same state have comparable population and economic profiles.

City	Population	Median Income	Home Value	Bachelor's+	Poverty
Allen CDP	860	N/A	N/A	0.0%	34.4%
Mina CDP	888	$102,969	$448,600	47.5%	0.9%
Meadow View Addition CDP	880	$92,470	$227,700	19.4%	5.1%
Wanblee CDP	744	N/A	N/A	13.5%	42.6%
Valley Springs city	967	$97,031	$178,900	17.4%	7.4%

Population Overview

Lake Madison CDP is a small community located in South Dakota. The total population is 885. It ranks as the 91st most populous out of 439 cities and towns in South Dakota.

Age Demographics

The median age in Lake Madison CDP is 61.3 years. This is 63% higher than the state median of 37.7 years.

Economy, Income & Housing

The median household income in Lake Madison CDP is $116,648. This is 61% higher than the state median of $72,421. Compared to the national median of $78,538, household income here is 49% higher. The poverty rate stands at 12.9%. This is 7% higher than the state poverty rate of 12.0%. The unemployment rate is 3.3%. This is 8% higher than the state rate of 3.0%. The median home value is $496,600. Housing costs are 110% higher than the state median of $236,800. The home-value-to-income ratio is 4.3x. 88.4% of occupied housing units are owner-occupied. This homeownership rate is 29% higher than the state average of 68.6%.

Race & Ethnicity

The largest racial or ethnic group in Lake Madison CDP is White (non-Hispanic), making up 80.0% of the population.

Education

48.5% of residents aged 25 and older hold a bachelor's degree or higher. This places Lake Madison CDP in the top 10% of all cities in the state for educational attainment. This is 56% higher than the state rate of 31.1%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 99.6%. Notably, 17.3% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Lake Madison CDP, South Dakota is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against South Dakota state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 439 Census-designated places in South Dakota. For official data, visit data.census.gov.

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Frequently Asked Questions

What is the population of Lake Madison CDP, South Dakota?

Lake Madison CDP, South Dakota has a population of 885 according to the most recent U.S. Census ACS 5-Year Estimates.

What is the median household income in Lake Madison CDP, SD?

The median household income in Lake Madison CDP is $116,648, which is 49% higher the national median of $78,538.

What is the poverty rate in Lake Madison CDP, SD?

The poverty rate in Lake Madison CDP is 12.9%. This means approximately 114 residents live below the federal poverty line.

What is the racial makeup of Lake Madison CDP, South Dakota?

Lake Madison CDP's population is 80.0% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.

What is the median home value in Lake Madison CDP, SD?

The median home value in Lake Madison CDP is $496,600. The home-value-to-income ratio is 4.3x.

How educated is Lake Madison CDP, South Dakota?

48.5% of adults (25+) in Lake Madison CDP hold a bachelor's degree or higher, and 17.3% hold a graduate or professional degree.