The map above shows Indiana and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Indiana vs South Australia Geography
Land area: Indiana has a land area of 35,825 square miles (92,787 km²), while South Australia has 380,048 square miles (984,321 km²). South Australia's land area is 10.6 times larger than Indiana's.
Total area: Indiana: 36,421 square miles (94,331 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water. South Australia's total area is 10.4 times larger than Indiana's.
Length: Indiana is 276 miles (444 km) long from north to south; South Australia is 1,078 miles (1,735 km). South Australia's north-south length is 3.9 times (291%) longer than Indiana's.
Width: Indiana spans 193 miles (310 km) east to west; South Australia spans 825 miles (1,328 km). South Australia's east-west width is 4.3 times (327%) wider than Indiana's.
Highest point: Indiana's highest point is Hoosier Hill at 1,255 feet (383 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m). Mount Woodroffe is 3,453 feet higher than Hoosier Hill.
Lowest point: Indiana's lowest point is Ohio River at 330 feet; South Australia's is Lake Eyre at -49 feet. South Australia's lowest point is 379 feet lower.
Indiana vs South Australia Population and History
Population: Indiana has a population of 6,924,275 (2024), while South Australia has 1,908,182 (2025). Indiana's population is 3.6 times (263%) larger than South Australia's.
Population density: Indiana: 193.3 people per square mile vs South Australia: 5.0. Indiana's population density is 38.7 times higher than South Australia's.
Largest metro area: Indiana's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs South Australia's Greater Adelaide (1,491,015). Chicago-Naperville-Elgin, IL-IN metro area's population is 6.3 times (531%) larger than Greater Adelaide's.
History: Indiana: Admitted to the Union on December 11, 1816, as the 19th state. South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836. In its current form, Indiana is the older of the two by 85 years.
Indiana vs South Australia Economy
GDP: Indiana's GDP is $519.5 billion (2024) vs South Australia's $100.2 billion. Indiana's economic output is 5.2 times (418%) larger than South Australia's.
GDP per capita: Indiana: $75,028 per person vs South Australia: $52,511. Indiana's GDP per capita is 1.4 times (43%) higher than South Australia's.
Official Websites
Indiana official website · South Australia official website
More Size Comparisons
All Indiana 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.