The map above shows Mississippi and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Mississippi vs South Australia Geography
Land area: Mississippi has a land area of 46,925 square miles (121,534 km²), while South Australia has 380,048 square miles (984,321 km²). South Australia's land area is 8.1 times (710%) larger than Mississippi's.
Total area: Mississippi: 48,436 square miles (125,448 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water. South Australia's total area is 7.8 times (685%) larger than Mississippi's.
Length: Mississippi is 337 miles (542 km) long from north to south; South Australia is 1,078 miles (1,735 km). South Australia's north-south length is 3.2 times (220%) longer than Mississippi's.
Width: Mississippi spans 340 miles (547 km) east to west; South Australia spans 825 miles (1,328 km). South Australia's east-west width is 2.4 times (143%) wider than Mississippi's.
Highest point: Mississippi's highest point is Woodall Mountain at 805 feet (245 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m). Mount Woodroffe is 3,903 feet higher than Woodall Mountain.
Lowest point: Mississippi's lowest point is Gulf of Mexico at 0 feet; South Australia's is Lake Eyre at -49 feet. South Australia's lowest point is 49 feet lower.
Mississippi vs South Australia Population and History
Population: Mississippi has a population of 2,943,045 (2024), while South Australia has 1,908,182 (2025). Mississippi's population is 1.5 times (54%) larger than South Australia's.
Population density: Mississippi: 62.7 people per square mile vs South Australia: 5.0. Mississippi's population density is 12.5 times higher than South Australia's.
Largest metro area: Mississippi's largest metropolitan area is Memphis, TN-MS-AR metro area (1,339,345 people) vs South Australia's Greater Adelaide (1,491,015). Greater Adelaide's population is 1.1 times (11%) larger than Memphis, TN-MS-AR metro area's.
History: Mississippi: Admitted to the Union on December 10, 1817, as the 20th state. South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836. In its current form, Mississippi is the older of the two by 84 years.
Mississippi vs South Australia Economy
GDP: Mississippi's GDP is $158.2 billion (2024) vs South Australia's $100.2 billion. Mississippi's economic output is 1.6 times (58%) larger than South Australia's.
GDP per capita: Mississippi: $53,751 per person vs South Australia: $52,511. Mississippi and South Australia have about the same GDP per capita.
Official Websites
Mississippi official website · South Australia official website
More Size Comparisons
All Mississippi 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.