The map above shows Hawaii and South Dakota side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Hawaii vs South Dakota Geography
Land area: Hawaii has a land area of 6,423 square miles (16,634 km²), while South Dakota has 75,808 square miles (196,342 km²). South Dakota's land area is 11.8 times larger than Hawaii's.
Total area: Hawaii: 10,970 square miles (28,412 km²) vs South Dakota: 77,116 square miles (199,729 km²), including inland and coastal water. South Dakota's total area is 7.0 times (603%) larger than Hawaii's.
Length: Hawaii is 333 miles (536 km) long from north to south; South Dakota is 443 miles (712 km). South Dakota's north-south length is 1.3 times (33%) longer than Hawaii's.
Width: Hawaii spans 386 miles (621 km) east to west; South Dakota spans 371 miles (597 km). Hawaii and South Dakota have about the same east-west width.
Highest point: Hawaii's highest point is Mauna Kea at 13,795 feet (4,205 m); South Dakota's is Black Elk Peak at 7,198 feet (2,194 m). Mauna Kea is 6,597 feet higher than Black Elk Peak.
Lowest point: Hawaii's lowest point is Pacific Ocean at 0 feet; South Dakota's is Big Stone Lake at 966 feet. Hawaii's lowest point is 966 feet lower.
Hawaii vs South Dakota Population and History
Population: Hawaii has a population of 1,446,146 (2024), while South Dakota has 924,669 (2024). Hawaii's population is 1.6 times (56%) larger than South Dakota's.
Population density: Hawaii: 225.2 people per square mile vs South Dakota: 12.2. Hawaii's population density is 18.5 times higher than South Dakota's.
Biggest city: Hawaii's biggest city is Honolulu with 344,967 people; South Dakota's is Sioux Falls with 209,289. Honolulu's population is 1.6 times (65%) larger than Sioux Falls'.
Largest metro area: Hawaii's largest metropolitan area is Urban Honolulu, HI metro area (998,747 people) vs South Dakota's Sioux Falls, SD-MN metro area (308,266). Urban Honolulu, HI metro area's population is 3.2 times (224%) larger than Sioux Falls, SD-MN metro area's.
History: Hawaii: Admitted to the Union on August 21, 1959, as the 50th state. South Dakota: Admitted to the Union on November 2, 1889, as the 40th state. In its current form, South Dakota is the older of the two by 70 years.
Hawaii vs South Dakota Economy
GDP: Hawaii's GDP is $117.6 billion (2024) vs South Dakota's $76.8 billion. Hawaii's economic output is 1.5 times (53%) larger than South Dakota's.
GDP per capita: Hawaii: $81,339 per person vs South Dakota: $83,052. Hawaii and South Dakota have about the same GDP per capita.
Average income: Hawaii: $71,019 vs South Dakota: $75,699 average income per person (per capita personal income). South Dakota's average income is 1.1 times (7%) higher than Hawaii's.
Hawaii vs South Dakota Counties
Number of counties: Hawaii has 5 counties, while South Dakota has 66. South Dakota's county count is 13.2 times higher than Hawaii's.
Biggest county by area: Hawaii's largest county is Hawaii County at 4,028 square miles; South Dakota's is Meade County at 3,471 square miles. Hawaii County's land area is 1.2 times (16%) larger than Meade County's.
Smallest county by area: Hawaii: Kalawao County (12 sq mi) vs South Dakota: Clay County (412 sq mi). Clay County's land area is 34.3 times larger than Kalawao County's.
Most populous county: Hawaii: Honolulu County (998,747 people) vs South Dakota: Minnehaha County (208,639 people). Honolulu County's population is 4.8 times (379%) larger than Minnehaha County's.
Least populous county: Hawaii: Kalawao County (81 people) vs South Dakota: Jones County (874 people). Jones County's population is 10.8 times larger than Kalawao County's.
Richest county: Hawaii: Honolulu County ($74,681 per capita income) vs South Dakota: Union County ($146,712). Union County's income is 2.0 times (96%) richer than Honolulu County's.
Poorest county: Hawaii: Hawaii County ($57,694 per capita income) vs South Dakota: Ziebach County ($32,778). Hawaii County's income is 1.8 times (76%) richer than Ziebach County's.
Hawaii vs South Dakota Taxes
State income tax: Hawaii has a top income tax rate of 11%, while South Dakota has no state income tax. Hawaii's top rate is 11 percentage points higher.
Property tax: Hawaii: 0.27% effective rate vs South Dakota: 1.02% of home value per year. South Dakota's rate is 0.75 percentage points higher.
Sales tax: Hawaii: 4.5% combined state and average local rate vs South Dakota: 6.11%. South Dakota's combined rate is 1.61 percentage points higher.
Official Websites
Hawaii official website · South Dakota official website
More Size Comparisons
All Hawaii size comparisons · All South Dakota 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.