The map above shows Oregon and South Dakota side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Oregon vs South Dakota Geography
Land area: Oregon has a land area of 95,997 square miles (248,630 km²), while South Dakota has 75,808 square miles (196,342 km²). Oregon's land area is 1.3 times (27%) larger than South Dakota's.
Total area: Oregon: 98,379 square miles (254,799 km²) vs South Dakota: 77,116 square miles (199,729 km²), including inland and coastal water. Oregon's total area is 1.3 times (28%) larger than South Dakota's.
Length: Oregon is 453 miles (730 km) long from north to south; South Dakota is 443 miles (712 km). Oregon and South Dakota have about the same north-south length.
Width: Oregon spans 445 miles (715 km) east to west; South Dakota spans 371 miles (597 km). Oregon's east-west width is 1.2 times (20%) wider than South Dakota's.
Highest point: Oregon's highest point is Mount Hood at 11,232 feet (3,424 m); South Dakota's is Black Elk Peak at 7,198 feet (2,194 m). Mount Hood is 4,034 feet higher than Black Elk Peak.
Lowest point: Oregon's lowest point is Pacific Ocean at 0 feet; South Dakota's is Big Stone Lake at 966 feet. Oregon's lowest point is 966 feet lower.
Oregon vs South Dakota Population and History
Population: Oregon has a population of 4,272,371 (2024), while South Dakota has 924,669 (2024). Oregon's population is 4.6 times (362%) larger than South Dakota's.
Population density: Oregon: 44.5 people per square mile vs South Dakota: 12.2. Oregon's population density is 3.6 times (265%) higher than South Dakota's.
Biggest city: Oregon's biggest city is Portland with 635,749 people; South Dakota's is Sioux Falls with 209,289. Portland's population is 3.0 times (204%) larger than Sioux Falls'.
Largest metro area: Oregon's largest metropolitan area is Portland-Vancouver-Hillsboro, OR-WA metro area (2,537,904 people) vs South Dakota's Sioux Falls, SD-MN metro area (308,266). Portland-Vancouver-Hillsboro, OR-WA metro area's population is 8.2 times (723%) larger than Sioux Falls, SD-MN metro area's.
History: Oregon: Admitted to the Union on February 14, 1859, as the 33rd state. South Dakota: Admitted to the Union on November 2, 1889, as the 40th state. In its current form, Oregon is the older of the two by 30 years.
Oregon vs South Dakota Economy
GDP: Oregon's GDP is $330.2 billion (2024) vs South Dakota's $76.8 billion. Oregon's economic output is 4.3 times (330%) larger than South Dakota's.
GDP per capita: Oregon: $77,299 per person vs South Dakota: $83,052. South Dakota's GDP per capita is 1.1 times (7%) higher than Oregon's.
Average income: Oregon: $70,823 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 Oregon's.
Oregon vs South Dakota Counties
Number of counties: Oregon has 36 counties, while South Dakota has 66. South Dakota's county count is 1.8 times (83%) higher than Oregon's.
Biggest county by area: Oregon's largest county is Harney County at 10,134 square miles; South Dakota's is Meade County at 3,471 square miles. Harney County's land area is 2.9 times (192%) larger than Meade County's.
Smallest county by area: Oregon: Multnomah County (431 sq mi) vs South Dakota: Clay County (412 sq mi). Multnomah County and Clay County have about the same land area.
Most populous county: Oregon: Multnomah County (795,897 people) vs South Dakota: Minnehaha County (208,639 people). Multnomah County's population is 3.8 times (281%) larger than Minnehaha County's.
Least populous county: Oregon: Wheeler County (1,456 people) vs South Dakota: Jones County (874 people). Wheeler County's population is 1.7 times (67%) larger than Jones County's.
Richest county: Oregon: Deschutes County ($86,176 per capita income) vs South Dakota: Union County ($146,712). Union County's income is 1.7 times (70%) richer than Deschutes County's.
Poorest county: Oregon: Malheur County ($42,974 per capita income) vs South Dakota: Ziebach County ($32,778). Malheur County's income is 1.3 times (31%) richer than Ziebach County's.
Oregon vs South Dakota Taxes
State income tax: Oregon has a top income tax rate of 9.9%, while South Dakota has no state income tax. Oregon's top rate is 9.9 percentage points higher.
Property tax: Oregon: 0.78% effective rate vs South Dakota: 1.02% of home value per year. South Dakota's rate is 0.24 percentage points higher.
Sales tax: Oregon: 0% combined state and average local rate vs South Dakota: 6.11%. South Dakota's combined rate is 6.11 percentage points higher.
Official Websites
Oregon official website · South Dakota official website
More Size Comparisons
All Oregon 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.