The map above shows New Hampshire and South Dakota side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Hampshire vs South Dakota Geography
Land area: New Hampshire has a land area of 8,954 square miles (23,190 km²), while South Dakota has 75,808 square miles (196,342 km²). South Dakota's land area is 8.5 times (747%) larger than New Hampshire's.
Total area: New Hampshire: 9,350 square miles (24,216 km²) vs South Dakota: 77,116 square miles (199,729 km²), including inland and coastal water. South Dakota's total area is 8.2 times (725%) larger than New Hampshire's.
Length: New Hampshire is 180 miles (290 km) long from north to south; South Dakota is 443 miles (712 km). South Dakota's north-south length is 2.5 times (146%) longer than New Hampshire's.
Width: New Hampshire spans 95 miles (152 km) east to west; South Dakota spans 371 miles (597 km). South Dakota's east-west width is 3.9 times (291%) wider than New Hampshire's.
Highest point: New Hampshire's highest point is Mount Washington at 6,277 feet (1,913 m); South Dakota's is Black Elk Peak at 7,198 feet (2,194 m). Black Elk Peak is 921 feet higher than Mount Washington.
Lowest point: New Hampshire's lowest point is Atlantic Ocean at 0 feet; South Dakota's is Big Stone Lake at 966 feet. New Hampshire's lowest point is 966 feet lower.
New Hampshire vs South Dakota Population and History
Population: New Hampshire has a population of 1,409,032 (2024), while South Dakota has 924,669 (2024). New Hampshire's population is 1.5 times (52%) larger than South Dakota's.
Population density: New Hampshire: 157.4 people per square mile vs South Dakota: 12.2. New Hampshire's population density is 12.9 times higher than South Dakota's.
Biggest city: New Hampshire's biggest city is Manchester with 116,386 people; South Dakota's is Sioux Falls with 209,289. Sioux Falls' population is 1.8 times (80%) larger than Manchester's.
Largest metro area: New Hampshire's largest metropolitan area is Boston-Cambridge-Newton, MA-NH metro area (5,025,517 people) vs South Dakota's Sioux Falls, SD-MN metro area (308,266). Boston-Cambridge-Newton, MA-NH metro area's population is 16.3 times larger than Sioux Falls, SD-MN metro area's.
History: New Hampshire: Admitted to the Union on June 21, 1788, as the 9th state. South Dakota: Admitted to the Union on November 2, 1889, as the 40th state. In its current form, New Hampshire is the older of the two by 101 years.
New Hampshire vs South Dakota Economy
GDP: New Hampshire's GDP is $119.3 billion (2024) vs South Dakota's $76.8 billion. New Hampshire's economic output is 1.6 times (55%) larger than South Dakota's.
GDP per capita: New Hampshire: $84,694 per person vs South Dakota: $83,052. New Hampshire and South Dakota have about the same GDP per capita.
Average income: New Hampshire: $83,192 vs South Dakota: $75,699 average income per person (per capita personal income). New Hampshire's average income is 1.1 times (10%) higher than South Dakota's.
New Hampshire vs South Dakota Counties
Number of counties: New Hampshire has 10 counties, while South Dakota has 66. South Dakota's county count is 6.6 times (560%) higher than New Hampshire's.
Biggest county by area: New Hampshire's largest county is Coos County at 1,795 square miles; South Dakota's is Meade County at 3,471 square miles. Meade County's land area is 1.9 times (93%) larger than Coos County's.
Smallest county by area: New Hampshire: Strafford County (368 sq mi) vs South Dakota: Clay County (412 sq mi). Clay County's land area is 1.1 times (12%) larger than Strafford County's.
Most populous county: New Hampshire: Hillsborough County (430,462 people) vs South Dakota: Minnehaha County (208,639 people). Hillsborough County's population is 2.1 times (106%) larger than Minnehaha County's.
Least populous county: New Hampshire: Coos County (31,094 people) vs South Dakota: Jones County (874 people). Coos County's population is 35.6 times larger than Jones County's.
Richest county: New Hampshire: Rockingham County ($100,216 per capita income) vs South Dakota: Union County ($146,712). Union County's income is 1.5 times (46%) richer than Rockingham County's.
Poorest county: New Hampshire: Coos County ($60,657 per capita income) vs South Dakota: Ziebach County ($32,778). Coos County's income is 1.9 times (85%) richer than Ziebach County's.
New Hampshire vs South Dakota Taxes
State income tax: New Hampshire has no state income tax, while South Dakota has no state income tax.
Property tax: New Hampshire: 1.46% effective rate vs South Dakota: 1.02% of home value per year. New Hampshire's rate is 0.44 percentage points higher.
Sales tax: New Hampshire: 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
New Hampshire official website · South Dakota official website
More Size Comparisons
All New Hampshire 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.