Madison is a city in Lake County, South Dakota, United States.

[9] According to the United States Census Bureau, the city has a total area of 4.61 square miles (11.94 km2), all land.

There were 2,848 housing units at an average density of 617.8 per square mile (238.5/km2).

37.3% of all households were made up of individuals, and 14.2% had someone living alone who was 65 years of age or older.

There were 2,706 housing units at an average density of 632.8 per square mile (244.3/km2).

34.8% of all households were made up of individuals, and 16.7% had someone living alone who was 65 years of age or older.

[17] On May 12, 2022, Madison, along with several other towns in the region, were affected by a destructive derecho.

Madison was once served by passenger trains of the Milwaukee Road.