The map above shows South Dakota and Prince Edward Island side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
South Dakota vs Prince Edward Island Geography
Land area: South Dakota has a land area of 75,808 square miles (196,342 km²), while Prince Edward Island has 2,185 square miles (5,660 km²). South Dakota's land area is 34.7 times larger than Prince Edward Island's.
Total area: South Dakota: 77,116 square miles (199,729 km²) vs Prince Edward Island: 2,185 square miles (5,660 km²), including inland and coastal water. South Dakota's total area is 35.3 times larger than Prince Edward Island's.
Length: South Dakota is 443 miles (712 km) long from north to south; Prince Edward Island is 97 miles (157 km). South Dakota's north-south length is 4.6 times (357%) longer than Prince Edward Island's.
Width: South Dakota spans 371 miles (597 km) east to west; Prince Edward Island spans 117 miles (188 km). South Dakota's east-west width is 3.2 times (217%) wider than Prince Edward Island's.
Highest point: South Dakota's highest point is Black Elk Peak at 7,198 feet (2,194 m); Prince Edward Island's is Springton at 466 feet (142 m). Black Elk Peak is 6,732 feet higher than Springton.
Lowest point: South Dakota's lowest point is Big Stone Lake at 966 feet; Prince Edward Island's is Gulf of St. Lawrence at 0 feet. Prince Edward Island's lowest point is 966 feet lower.
South Dakota vs Prince Edward Island Population and History
Population: South Dakota has a population of 924,669 (2024), while Prince Edward Island has 182,001 (2026). South Dakota's population is 5.1 times (408%) larger than Prince Edward Island's.
Population density: South Dakota: 12.2 people per square mile vs Prince Edward Island: 83.3. Prince Edward Island's population density is 6.8 times (583%) higher than South Dakota's.
Biggest city: South Dakota's biggest city is Sioux Falls with 209,289 people; Prince Edward Island's is Charlottetown with 38,809. Sioux Falls' population is 5.4 times (439%) larger than Charlottetown's.
Largest metro area: South Dakota's largest metropolitan area is Sioux Falls, SD-MN metro area (308,266 people) vs Prince Edward Island's Charlottetown CMA (78,858). Sioux Falls, SD-MN metro area's population is 3.9 times (291%) larger than Charlottetown CMA's.
History: South Dakota: Admitted to the Union on November 2, 1889, as the 40th state. Prince Edward Island: Joined Confederation on July 1, 1873. In its current form, Prince Edward Island is the older of the two by 16 years.
South Dakota vs Prince Edward Island Economy
GDP: South Dakota's GDP is $76.8 billion (2024) vs Prince Edward Island's $8.0 billion. South Dakota's economic output is 9.6 times (860%) larger than Prince Edward Island's.
GDP per capita: South Dakota: $83,052 per person vs Prince Edward Island: $44,238. South Dakota's GDP per capita is 1.9 times (88%) higher than Prince Edward Island's.
Official Websites
South Dakota official website · Prince Edward Island official website
More Size Comparisons
All South Dakota size comparisons · All Prince Edward Island 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.