The map above shows Missouri and South Dakota side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Missouri vs South Dakota Geography
Land area
- Missouri has a land area of 68,746 square miles (178,052 km²), while South Dakota has 75,808 square miles (196,342 km²).
- South Dakota's land area is 1.1 times (10%) larger than Missouri's.
Total area
- Missouri: 69,707 square miles (180,540 km²) vs South Dakota: 77,116 square miles (199,729 km²), including inland and coastal water.
- South Dakota's total area is 1.1 times (11%) larger than Missouri's.
Length
- Missouri is 328 miles (529 km) long from north to south; South Dakota is 443 miles (712 km).
- South Dakota's north-south length is 1.4 times (35%) longer than Missouri's.
Width
- Missouri spans 437 miles (703 km) east to west; South Dakota spans 371 miles (597 km).
- Missouri's east-west width is 1.2 times (18%) wider than South Dakota's.
Highest point
- Missouri's highest point is Taum Sauk Mountain at 1,771 feet (540 m); South Dakota's is Black Elk Peak at 7,198 feet (2,194 m).
- Black Elk Peak is 5,427 feet higher than Taum Sauk Mountain.
Lowest point
- Missouri's lowest point is St. Francis River at 230 feet; South Dakota's is Big Stone Lake at 966 feet.
- Missouri's lowest point is 736 feet lower.
Missouri vs South Dakota Population and History
Population
- Missouri has a population of 6,245,466 (2024), while South Dakota has 924,669 (2024).
- Missouri's population is 6.8 times (575%) larger than South Dakota's.
Population density
- Missouri: 90.8 people per square mile vs South Dakota: 12.2.
- Missouri's population density is 7.4 times (644%) higher than South Dakota's.
Biggest city
- Missouri's biggest city is Kansas City with 516,032 people; South Dakota's is Sioux Falls with 209,289.
- Kansas City's population is 2.5 times (147%) larger than Sioux Falls'.
Largest metro area
- Missouri's largest metropolitan area is St. Louis, MO-IL metro area (2,811,927 people) vs South Dakota's Sioux Falls, SD-MN metro area (308,266).
- St. Louis, MO-IL metro area's population is 9.1 times (812%) larger than Sioux Falls, SD-MN metro area's.
History
- Missouri: Admitted to the Union on August 10, 1821, as the 24th state.
- South Dakota: Admitted to the Union on November 2, 1889, as the 40th state.
- In its current form, Missouri is the older of the two by 68 years.
Missouri vs South Dakota Economy
GDP
- Missouri's GDP is $448.7 billion (2024) vs South Dakota's $76.8 billion.
- Missouri's economic output is 5.8 times (484%) larger than South Dakota's.
GDP per capita
- Missouri: $71,846 per person vs South Dakota: $83,052.
- South Dakota's GDP per capita is 1.2 times (16%) higher than Missouri's.
Average income
- Missouri: $64,920 vs South Dakota: $75,699 average income per person (per capita personal income).
- South Dakota's average income is 1.2 times (17%) higher than Missouri's.
Missouri vs South Dakota Counties
Number of counties
- Missouri has 115 counties, while South Dakota has 66.
- Missouri's county count is 1.7 times (74%) higher than South Dakota's.
Biggest county by area
- Missouri's largest county is Texas County at 1,177 square miles; South Dakota's is Meade County at 3,471 square miles.
- Meade County's land area is 2.9 times (195%) larger than Texas County's.
Smallest county by area
- Missouri: St. Louis city (62 sq mi) vs South Dakota: Clay County (412 sq mi).
- Clay County's land area is 6.7 times (568%) larger than St. Louis city's.
Most populous county
- Missouri: St. Louis County (992,929 people) vs South Dakota: Minnehaha County (208,639 people).
- St. Louis County's population is 4.8 times (376%) larger than Minnehaha County's.
Least populous county
- Missouri: Worth County (1,872 people) vs South Dakota: Jones County (874 people).
- Worth County's population is 2.1 times (114%) larger than Jones County's.
Richest county
- Missouri: St. Louis County ($104,775 per capita income) vs South Dakota: Union County ($146,712).
- Union County's income is 1.4 times (40%) richer than St. Louis County's.
Poorest county
- Missouri: Douglas County ($40,515 per capita income) vs South Dakota: Ziebach County ($32,778).
- Douglas County's income is 1.2 times (24%) richer than Ziebach County's.
Missouri vs South Dakota Taxes
State income tax
- Missouri has a top income tax rate of 4.7%, while South Dakota has no state income tax.
- Missouri's top rate is 4.7 percentage points higher.
Property tax
- Missouri: 0.79% effective rate vs South Dakota: 1.02% of home value per year.
- South Dakota's rate is 0.23 percentage points higher.
Sales tax
- Missouri: 8.44% combined state and average local rate vs South Dakota: 6.11%.
- Missouri's combined rate is 2.33 percentage points higher.
Official Websites
Missouri official website · South Dakota official website
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More Size Comparisons
All Missouri 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.