The map above shows Arizona and South Dakota side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Arizona vs South Dakota Geography
Land area
- Arizona has a land area of 113,655 square miles (294,366 km²), while South Dakota has 75,808 square miles (196,342 km²).
- Arizona's land area is 1.5 times (50%) larger than South Dakota's.
Total area
- Arizona: 113,985 square miles (295,220 km²) vs South Dakota: 77,116 square miles (199,729 km²), including inland and coastal water.
- Arizona's total area is 1.5 times (48%) larger than South Dakota's.
Length
- Arizona is 429 miles (690 km) long from north to south; South Dakota is 443 miles (712 km).
- Arizona and South Dakota have about the same north-south length.
Width
- Arizona spans 452 miles (727 km) east to west; South Dakota spans 371 miles (597 km).
- Arizona's east-west width is 1.2 times (22%) wider than South Dakota's.
Highest point
- Arizona's highest point is Humphreys Peak at 12,620 feet (3,847 m); South Dakota's is Black Elk Peak at 7,198 feet (2,194 m).
- Humphreys Peak is 5,422 feet higher than Black Elk Peak.
Lowest point
- Arizona's lowest point is Colorado River at 71 feet; South Dakota's is Big Stone Lake at 966 feet.
- Arizona's lowest point is 895 feet lower.
Arizona vs South Dakota Population and History
Population
- Arizona has a population of 7,582,384 (2024), while South Dakota has 924,669 (2024).
- Arizona's population is 8.2 times (720%) larger than South Dakota's.
Population density
- Arizona: 66.7 people per square mile vs South Dakota: 12.2.
- Arizona's population density is 5.5 times (447%) higher than South Dakota's.
Biggest city
- Arizona's biggest city is Phoenix with 1,673,164 people; South Dakota's is Sioux Falls with 209,289.
- Phoenix's population is 8.0 times (699%) larger than Sioux Falls'.
Largest metro area
- Arizona's largest metropolitan area is Phoenix-Mesa-Chandler, AZ metro area (5,186,958 people) vs South Dakota's Sioux Falls, SD-MN metro area (308,266).
- Phoenix-Mesa-Chandler, AZ metro area's population is 16.8 times larger than Sioux Falls, SD-MN metro area's.
History
- Arizona: Admitted to the Union on February 14, 1912, as the 48th 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 23 years.
Arizona vs South Dakota Economy
GDP
- Arizona's GDP is $570.1 billion (2024) vs South Dakota's $76.8 billion.
- Arizona's economic output is 7.4 times (642%) larger than South Dakota's.
GDP per capita
- Arizona: $75,186 per person vs South Dakota: $83,052.
- South Dakota's GDP per capita is 1.1 times (10%) higher than Arizona's.
Average income
- Arizona: $65,798 vs South Dakota: $75,699 average income per person (per capita personal income).
- South Dakota's average income is 1.2 times (15%) higher than Arizona's.
Arizona vs South Dakota Counties
Number of counties
- Arizona has 15 counties, while South Dakota has 66.
- South Dakota's county count is 4.4 times (340%) higher than Arizona's.
Biggest county by area
- Arizona's largest county is Coconino County at 18,616 square miles; South Dakota's is Meade County at 3,471 square miles.
- Coconino County's land area is 5.4 times (436%) larger than Meade County's.
Smallest county by area
- Arizona: Santa Cruz County (1,236 sq mi) vs South Dakota: Clay County (412 sq mi).
- Santa Cruz County's land area is 3.0 times (200%) larger than Clay County's.
Most populous county
- Arizona: Maricopa County (4,673,096 people) vs South Dakota: Minnehaha County (208,639 people).
- Maricopa County's population is 22.4 times larger than Minnehaha County's.
Least populous county
- Arizona: Greenlee County (9,410 people) vs South Dakota: Jones County (874 people).
- Greenlee County's population is 10.8 times larger than Jones County's.
Richest county
- Arizona: Maricopa County ($72,176 per capita income) vs South Dakota: Union County ($146,712).
- Union County's income is 2.0 times (103%) richer than Maricopa County's.
Poorest county
- Arizona: Graham County ($44,164 per capita income) vs South Dakota: Ziebach County ($32,778).
- Graham County's income is 1.3 times (35%) richer than Ziebach County's.
Arizona vs South Dakota Taxes
State income tax
- Arizona has a top income tax rate of 2.5%, while South Dakota has no state income tax.
- Arizona's top rate is 2.5 percentage points higher.
Property tax
- Arizona: 0.43% effective rate vs South Dakota: 1.02% of home value per year.
- South Dakota's rate is 0.59 percentage points higher.
Sales tax
- Arizona: 8.54% combined state and average local rate vs South Dakota: 6.11%.
- Arizona's combined rate is 2.43 percentage points higher.
Official Websites
Arizona official website · South Dakota official website
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More Size Comparisons
All Arizona 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.