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SDSouth Dakota Geography
Overview
South Dakota occupies the 17th largest area among US states. Located in the Midwest region, specifically the plains subregion, its physical geography reflects its position on the continent. The state is landlocked, with no direct ocean access.
Topography and landforms
- Part of the Great Plains
- Crossed by the Missouri River
- In Tornado Alley
Rivers and water
The Missouri River flows through South Dakota — at 2,341 miles, it is the longest river in North America.
Mountains and elevation
South Dakota has moderate elevation across most of its territory, without dominating mountain ranges.
Climate and time zone
South Dakota falls in the Central time zone (the state spans multiple time zones — a small western or eastern portion may differ). It lies in Tornado Alley, with peak severe weather season in spring.
National parks and protected areas
The National Park Service manages many sites in South Dakota including national parks, national monuments, national forests, and historic sites. Tourism, particularly to natural areas, is a major part of the state economy.
Wildlife
South Dakota's wildlife reflects its geography. Forests, plains, rivers, and (where applicable) coasts support a wide range of mammals, birds, fish, and reptiles. Protected populations of native species are maintained through state and federal wildlife management agencies.
Bordering states
South Dakota shares borders with 6 other US states.
Daily geography puzzle
Statedoku uses geographic features (mountains, deserts, rivers, regions) as constraints — practice your map awareness in 5 minutes a day.
Play today's puzzle →Common questions about South Dakota geography
What is the climate of South Dakota?
South Dakota observes Central Time and has a climate shaped by its location in the Midwest region. Specific climate type varies — see the dedicated weather page for details.
How big is South Dakota?
South Dakota ranks #17 of 50 by area. It is mid-sized by US standards.
Does South Dakota have mountains?
No major mountain ranges run through the state.
What national parks are in South Dakota?
South Dakota has several state parks and may contain national monuments or national forests. Check the National Park Service website for the current list.
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