The map above shows Missouri and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Missouri vs South Australia Geography
Land area
- Missouri has a land area of 68,746 square miles (178,052 km²), while South Australia has 380,048 square miles (984,321 km²).
- South Australia's land area is 5.5 times (453%) larger than Missouri's.
Total area
- Missouri: 69,707 square miles (180,540 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water.
- South Australia's total area is 5.5 times (445%) larger than Missouri's.
Length
- Missouri is 328 miles (529 km) long from north to south; South Australia is 1,078 miles (1,735 km).
- South Australia's north-south length is 3.3 times (229%) longer than Missouri's.
Width
- Missouri spans 437 miles (703 km) east to west; South Australia spans 825 miles (1,328 km).
- South Australia's east-west width is 1.9 times (89%) wider than Missouri's.
Highest point
- Missouri's highest point is Taum Sauk Mountain at 1,771 feet (540 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m).
- Mount Woodroffe is 2,937 feet higher than Taum Sauk Mountain.
Lowest point
- Missouri's lowest point is St. Francis River at 230 feet; South Australia's is Lake Eyre at -49 feet.
- South Australia's lowest point is 279 feet lower.
Missouri vs South Australia Population and History
Population
- Missouri has a population of 6,245,466 (2024), while South Australia has 1,908,182 (2025).
- Missouri's population is 3.3 times (227%) larger than South Australia's.
Population density
- Missouri: 90.8 people per square mile vs South Australia: 5.0.
- Missouri's population density is 18.2 times higher than South Australia's.
Largest metro area
- Missouri's largest metropolitan area is St. Louis, MO-IL metro area (2,811,927 people) vs South Australia's Greater Adelaide (1,491,015).
- St. Louis, MO-IL metro area's population is 1.9 times (89%) larger than Greater Adelaide's.
History
- Missouri: Admitted to the Union on August 10, 1821, as the 24th state.
- South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836.
- In its current form, Missouri is the older of the two by 80 years.
Missouri vs South Australia Economy
GDP
- Missouri's GDP is $448.7 billion (2024) vs South Australia's $100.2 billion.
- Missouri's economic output is 4.5 times (348%) larger than South Australia's.
GDP per capita
- Missouri: $71,846 per person vs South Australia: $52,511.
- Missouri's GDP per capita is 1.4 times (37%) higher than South Australia's.
Official Websites
Missouri official website · South Australia official website
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More Size Comparisons
All Missouri 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.