South Dakota map and facts
South Dakota, “the Mount Rushmore State”, is a Midwest state in the West North Central division. Its capital is Pierre.
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South Dakota in context
With 886,667 people counted in the 2020 Census, South Dakota holds about 0.3% of the US population. Its 77,116 square miles make it the 17th-largest state by area, and with 11.5 people per square mile it ranks 46th for population density.
South Dakota shares borders with Iowa, Minnesota, Montana, North Dakota, Nebraska, Wyoming. Want to see how it measures up? Compare South Dakota with Iowa.
South Dakota FAQ
What is the capital of South Dakota?
The capital of South Dakota is Pierre. The largest city is Sioux Falls, which is not the capital.
What is the population of South Dakota?
South Dakota had 886,667 residents in the 2020 Census, ranking 46th of the 50 states.
How big is South Dakota?
South Dakota covers 77,116 square miles (199,730 km²) including water, making it the 17th-largest state.
When did South Dakota become a state?
South Dakota became the 40th state on November 2, 1889.
What time zone is South Dakota in?
South Dakota is in the Central + Mountain (western half) time zones.
What states border South Dakota?
South Dakota borders 6 states: Iowa, Minnesota, Montana, North Dakota, Nebraska, Wyoming.