The map above shows Maryland and South Dakota side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Maryland vs South Dakota Geography
Land area
- Maryland has a land area of 9,711 square miles (25,151 km²), while South Dakota has 75,808 square miles (196,342 km²).
- South Dakota's land area is 7.8 times (681%) larger than Maryland's.
Total area
- Maryland: 12,406 square miles (32,131 km²) vs South Dakota: 77,116 square miles (199,729 km²), including inland and coastal water.
- South Dakota's total area is 6.2 times (522%) larger than Maryland's.
Length
- Maryland is 231 miles (371 km) long from north to south; South Dakota is 443 miles (712 km).
- South Dakota's north-south length is 1.9 times (92%) longer than Maryland's.
Width
- Maryland spans 243 miles (391 km) east to west; South Dakota spans 371 miles (597 km).
- South Dakota's east-west width is 1.5 times (53%) wider than Maryland's.
Highest point
- Maryland's highest point is Hoye-Crest at 3,362 feet (1,025 m); South Dakota's is Black Elk Peak at 7,198 feet (2,194 m).
- Black Elk Peak is 3,836 feet higher than Hoye-Crest.
Lowest point
- Maryland's lowest point is Atlantic Ocean at 0 feet; South Dakota's is Big Stone Lake at 966 feet.
- Maryland's lowest point is 966 feet lower.
Maryland vs South Dakota Population and History
Population
- Maryland has a population of 6,263,220 (2024), while South Dakota has 924,669 (2024).
- Maryland's population is 6.8 times (577%) larger than South Dakota's.
Population density
- Maryland: 645.0 people per square mile vs South Dakota: 12.2.
- Maryland's population density is 52.9 times higher than South Dakota's.
Biggest city
- Maryland's biggest city is Baltimore with 568,271 people; South Dakota's is Sioux Falls with 209,289.
- Baltimore's population is 2.7 times (172%) larger than Sioux Falls'.
Largest metro area
- Maryland's largest metropolitan area is Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489 people) vs South Dakota's Sioux Falls, SD-MN metro area (308,266).
- Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's population is 20.9 times larger than Sioux Falls, SD-MN metro area's.
History
- Maryland: Admitted to the Union on April 28, 1788, as the 7th state.
- South Dakota: Admitted to the Union on November 2, 1889, as the 40th state.
- In its current form, Maryland is the older of the two by 101 years.
Maryland vs South Dakota Economy
GDP
- Maryland's GDP is $546.0 billion (2024) vs South Dakota's $76.8 billion.
- Maryland's economic output is 7.1 times (611%) larger than South Dakota's.
GDP per capita
- Maryland: $87,180 per person vs South Dakota: $83,052.
- Maryland's GDP per capita is 1.0 times (5%) higher than South Dakota's.
Average income
- Maryland: $79,259 vs South Dakota: $75,699 average income per person (per capita personal income).
- Maryland's average income is 1.0 times (5%) higher than South Dakota's.
Maryland vs South Dakota Counties
Number of counties
- Maryland has 24 counties, while South Dakota has 66.
- South Dakota's county count is 2.8 times (175%) higher than Maryland's.
Biggest county by area
- Maryland's largest county is Frederick County at 661 square miles; South Dakota's is Meade County at 3,471 square miles.
- Meade County's land area is 5.3 times (425%) larger than Frederick County's.
Smallest county by area
- Maryland: Baltimore city (81 sq mi) vs South Dakota: Clay County (412 sq mi).
- Clay County's land area is 5.1 times (409%) larger than Baltimore city's.
Most populous county
- Maryland: Montgomery County (1,082,273 people) vs South Dakota: Minnehaha County (208,639 people).
- Montgomery County's population is 5.2 times (419%) larger than Minnehaha County's.
Least populous county
- Maryland: Kent County (19,557 people) vs South Dakota: Jones County (874 people).
- Kent County's population is 22.4 times larger than Jones County's.
Richest county
- Maryland: Montgomery County ($104,882 per capita income) vs South Dakota: Union County ($146,712).
- Union County's income is 1.4 times (40%) richer than Montgomery County's.
Poorest county
- Maryland: Somerset County ($41,421 per capita income) vs South Dakota: Ziebach County ($32,778).
- Somerset County's income is 1.3 times (26%) richer than Ziebach County's.
Maryland vs South Dakota Taxes
State income tax
- Maryland has a top income tax rate of 6.5%, while South Dakota has no state income tax.
- Maryland's top rate is 6.5 percentage points higher.
Property tax
- Maryland: 0.95% effective rate vs South Dakota: 1.02% of home value per year.
- South Dakota's rate is 0.07 percentage points higher.
Sales tax
- Maryland: 6% combined state and average local rate vs South Dakota: 6.11%.
- South Dakota's combined rate is 0.11 percentage points higher.
Official Websites
Maryland official website · South Dakota official website
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More Size Comparisons
All Maryland 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.