The map above shows Massachusetts and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Massachusetts vs South Australia Geography
Land area: Massachusetts has a land area of 7,801 square miles (20,204 km²), while South Australia has 380,048 square miles (984,321 km²). South Australia's land area is 48.7 times larger than Massachusetts'.
Total area: Massachusetts: 10,554 square miles (27,335 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water. South Australia's total area is 36.0 times larger than Massachusetts'.
Length: Massachusetts is 123 miles (198 km) long from north to south; South Australia is 1,078 miles (1,735 km). South Australia's north-south length is 8.8 times (776%) longer than Massachusetts'.
Width: Massachusetts spans 185 miles (297 km) east to west; South Australia spans 825 miles (1,328 km). South Australia's east-west width is 4.5 times (346%) wider than Massachusetts'.
Highest point: Massachusetts's highest point is Mount Greylock at 3,489 feet (1,063 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m). Mount Woodroffe is 1,219 feet higher than Mount Greylock.
Lowest point: Massachusetts's lowest point is Atlantic Ocean at 0 feet; South Australia's is Lake Eyre at -49 feet. South Australia's lowest point is 49 feet lower.
Massachusetts vs South Australia Population and History
Population: Massachusetts has a population of 7,136,171 (2024), while South Australia has 1,908,182 (2025). Massachusetts' population is 3.7 times (274%) larger than South Australia's.
Population density: Massachusetts: 914.8 people per square mile vs South Australia: 5.0. Massachusetts' population density is 183.0 times higher than South Australia's.
Largest metro area: Massachusetts's largest metropolitan area is Boston-Cambridge-Newton, MA-NH metro area (5,025,517 people) vs South Australia's Greater Adelaide (1,491,015). Boston-Cambridge-Newton, MA-NH metro area's population is 3.4 times (237%) larger than Greater Adelaide's.
History: Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state. South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836. In its current form, Massachusetts is the older of the two by 113 years.
Massachusetts vs South Australia Economy
GDP: Massachusetts's GDP is $778.5 billion (2024) vs South Australia's $100.2 billion. Massachusetts' economic output is 7.8 times (677%) larger than South Australia's.
GDP per capita: Massachusetts: $109,095 per person vs South Australia: $52,511. Massachusetts' GDP per capita is 2.1 times (108%) higher than South Australia's.
Official Websites
Massachusetts official website · South Australia official website
More Size Comparisons
All Massachusetts 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.