The map above shows South Dakota and Northern Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
South Dakota vs Northern Ireland Geography
Land area
- South Dakota has a land area of 75,808 square miles (196,342 km²), while Northern Ireland has 5,236 square miles (13,562 km²).
- South Dakota's land area is 14.5 times larger than Northern Ireland's.
Total area
- South Dakota: 77,116 square miles (199,729 km²) vs Northern Ireland: 5,456 square miles (14,130 km²), including inland and coastal water.
- South Dakota's total area is 14.1 times larger than Northern Ireland's.
Length
- South Dakota is 443 miles (712 km) long from north to south; Northern Ireland is 83 miles (134 km).
- South Dakota's north-south length is 5.3 times (434%) longer than Northern Ireland's.
Width
- South Dakota spans 371 miles (597 km) east to west; Northern Ireland spans 107 miles (173 km).
- South Dakota's east-west width is 3.5 times (247%) wider than Northern Ireland's.
Highest point
- South Dakota's highest point is Black Elk Peak at 7,198 feet (2,194 m); Northern Ireland's is Slieve Donard at 2,789 feet (850 m).
- Black Elk Peak is 4,409 feet higher than Slieve Donard.
Lowest point
- South Dakota's lowest point is Big Stone Lake at 966 feet; Northern Ireland's is Irish Sea at 0 feet.
- Northern Ireland's lowest point is 966 feet lower.
South Dakota vs Northern Ireland Population and History
Population
- South Dakota has a population of 924,669 (2024), while Northern Ireland has 1,905,000 (2022).
- Northern Ireland's population is 2.1 times (106%) larger than South Dakota's.
Population density
- South Dakota: 12.2 people per square mile vs Northern Ireland: 363.8.
- Northern Ireland's population density is 29.8 times higher than South Dakota's.
Biggest city
- South Dakota's biggest city is Sioux Falls with 209,289 people; Northern Ireland's is Belfast with 348,005.
- Belfast's population is 1.7 times (66%) larger than Sioux Falls'.
History
- South Dakota: Admitted to the Union on November 2, 1889, as the 40th state.
- Northern Ireland: A country within the United Kingdom; created by the partition of Ireland on May 3, 1921.
- In its current form, South Dakota is the older of the two by 32 years.
South Dakota vs Northern Ireland Economy
GDP
- South Dakota's GDP is $76.8 billion (2024) vs Northern Ireland's $58.8 billion.
- South Dakota's economic output is 1.3 times (31%) larger than Northern Ireland's.
GDP per capita
- South Dakota: $83,052 per person vs Northern Ireland: $30,686.
- South Dakota's GDP per capita is 2.7 times (171%) higher than Northern Ireland's.
Official Websites
South Dakota official website · Northern Ireland official website
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More Size Comparisons
All South Dakota size comparisons · All Northern Ireland 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.