The map above shows South Dakota and American Samoa side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
South Dakota vs American Samoa Geography
Land area: South Dakota has a land area of 75,808 square miles (196,342 km²), while American Samoa has 77 square miles (199 km²). South Dakota's land area is 986.6 times larger than American Samoa's.
Total area: South Dakota: 77,116 square miles (199,729 km²) vs American Samoa: 581 square miles (1,505 km²), including inland and coastal water. South Dakota's total area is 132.7 times larger than American Samoa's.
Length: South Dakota is 443 miles (712 km) long from north to south; American Samoa is 9 miles (14 km). South Dakota's north-south length is 49.2 times longer than American Samoa's.
Width: South Dakota spans 371 miles (597 km) east to west; American Samoa spans 17 miles (28 km). South Dakota's east-west width is 21.8 times wider than American Samoa's.
Highest point: South Dakota's highest point is Black Elk Peak at 7,198 feet (2,194 m); American Samoa's is Lata Mountain at 3,169 feet (966 m). Black Elk Peak is 4,029 feet higher than Lata Mountain.
Lowest point: South Dakota's lowest point is Big Stone Lake at 966 feet; American Samoa's is Pacific Ocean at 0 feet. American Samoa's lowest point is 966 feet lower.
South Dakota vs American Samoa Population and History
Population: South Dakota has a population of 924,669 (2024), while American Samoa has 49,710 (2020). South Dakota's population is 18.6 times larger than American Samoa's.
Population density: South Dakota: 12.2 people per square mile vs American Samoa: 645.6. American Samoa's population density is 52.9 times higher than South Dakota's.
History: South Dakota: Admitted to the Union on November 2, 1889, as the 40th state. American Samoa: A US territory since 1900. In its current form, South Dakota is the older of the two by 11 years.
Official Websites
South Dakota official website · American Samoa official website
More Size Comparisons
All South Dakota size comparisons · All American Samoa size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.