The map above shows United States and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
United States vs South Australia Geography
Land area
- United States has a land area of 3,533,467 square miles (9,151,637 km²), while South Australia has 380,048 square miles (984,321 km²).
- United States' land area is 9.3 times (830%) larger than South Australia's.
Total area
- United States: 3,802,784 square miles (9,849,165 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water.
- United States' total area is 10.0 times larger than South Australia's.
Length
- United States is 3,628 miles (5,839 km) long from north to south; South Australia is 1,078 miles (1,735 km).
- United States' north-south length is 3.4 times (237%) longer than South Australia's.
Width
- United States spans 4,824 miles (7,763 km) east to west; South Australia spans 825 miles (1,328 km).
- United States' east-west width is 5.8 times (485%) wider than South Australia's.
Highest point
- United States's highest point is Denali at 20,308 feet (6,190 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m).
- Denali is 15,600 feet higher than Mount Woodroffe.
Lowest point
- United States's lowest point is Death Valley at -279 feet; South Australia's is Lake Eyre at -49 feet.
- United States's lowest point is 230 feet lower.
United States vs South Australia Population and History
Population
- United States has a population of 340,110,988 (2024), while South Australia has 1,908,182 (2025).
- United States' population is 178.2 times larger than South Australia's.
Population density
- United States: 96.3 people per square mile vs South Australia: 5.0.
- United States' population density is 19.3 times higher than South Australia's.
Largest metro area
- United States's largest metropolitan area is New York-Newark-Jersey City, NY-NJ metro area (19,940,274 people) vs South Australia's Greater Adelaide (1,491,015).
- New York-Newark-Jersey City, NY-NJ metro area's population is 13.4 times larger than Greater Adelaide's.
History
- United States: Declared independence on July 4, 1776.
- South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836.
- In its current form, United States is the older of the two by 125 years.
United States vs South Australia Economy
GDP
- United States's GDP is $30,769.7 billion (2025) vs South Australia's $100.2 billion.
- United States' economic output is 307.1 times larger than South Australia's.
GDP per capita
- United States: $89,599 per person vs South Australia: $52,511.
- United States' GDP per capita is 1.7 times (71%) higher than South Australia's.
Official Websites
United States official website · South Australia official website
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More Size Comparisons
All United States size comparisons · All South Australia 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.