Lake Madison, South Dakota facts for kids
Quick facts for kids
Lake Madison, South Dakota
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 Lake Madison, South Dakota
Location in South Dakota
Lake Madison, South Dakota
Location in the United States
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| Country | United States |
| State | South Dakota |
| County | Lake |
| Area | |
| • Total | 9.10 sq mi (23.58 km2) |
| • Land | 4.72 sq mi (12.23 km2) |
| • Water | 4.38 sq mi (11.35 km2) |
| Elevation | 1,604 ft (489 m) |
| Population
(2020)
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| • Total | 829 |
| • Density | 175.60/sq mi (67.80/km2) |
| Time zone | UTC-6 (Central (CST)) |
| • Summer (DST) | UTC-5 (CDT) |
| Area code(s) | 605 |
| GNIS feature ID | 2584557 |
| FIPS code | 46-35430 |
Lake Madison is a small community in South Dakota, United States. It is located in Lake County. This area is known as an "unincorporated community." It is also a "census-designated place," which means it has clear borders for counting its population.
In 2020, about 829 people lived in Lake Madison. The community is built right on the shores of a lake that shares its name, Lake Madison.
Where is Lake Madison?
Lake Madison is found in the southeastern part of Lake County. The community surrounds the beautiful Lake Madison.
It is located about 3 to 10 miles (5 to 16 kilometers) southeast of Madison. Madison is the main town and the "county seat" for Lake County. This means it's where the county government offices are.
A road called South Dakota Highway 34 runs along the northern edge of the community. This highway goes west into Madison. If you travel east on Highway 34, you will reach Interstate 29 after about 13 miles (21 kilometers).
Land and Water Area
The U.S. Census Bureau has measured the size of Lake Madison. The entire community covers about 9.10 square miles (23.58 square kilometers).
A little less than half of this area is land. The land area is about 4.75 square miles (12.23 square kilometers). The rest of the area is water, which is about 4.35 square miles (11.35 square kilometers).
Lake Madison itself flows southeast into another body of water called Round Lake. From there, the water goes into Brant Lake. All these lakes are part of the larger Big Sioux River watershed. A watershed is an area of land where all the water drains into a single river or lake.
Who Lives in Lake Madison?
| Historical population | |||
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| Census | Pop. | %± | |
| 2020 | 829 | — | |
| U.S. Decennial Census | |||
The population of Lake Madison was counted in the 2020 census. At that time, 829 people lived in the community. This number helps us understand how many people call Lake Madison home.
