The map above shows Maine and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Maine vs South Australia Geography
Land area: Maine has a land area of 30,845 square miles (79,888 km²), while South Australia has 380,048 square miles (984,321 km²). South Australia's land area is 12.3 times larger than Maine's.
Total area: Maine: 35,380 square miles (91,634 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water. South Australia's total area is 10.7 times larger than Maine's.
Length: Maine is 311 miles (501 km) long from north to south; South Australia is 1,078 miles (1,735 km). South Australia's north-south length is 3.5 times (247%) longer than Maine's.
Width: Maine spans 203 miles (327 km) east to west; South Australia spans 825 miles (1,328 km). South Australia's east-west width is 4.1 times (306%) wider than Maine's.
Highest point: Maine's highest point is Mount Katahdin at 5,253 feet (1,601 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m). Mount Katahdin is 545 feet higher than Mount Woodroffe.
Lowest point: Maine'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.
Maine vs South Australia Population and History
Population: Maine has a population of 1,405,012 (2024), while South Australia has 1,908,182 (2025). South Australia's population is 1.4 times (36%) larger than Maine's.
Population density: Maine: 45.6 people per square mile vs South Australia: 5.0. Maine's population density is 9.1 times (812%) higher than South Australia's.
Largest metro area: Maine's largest metropolitan area is Portland-South Portland, ME metro area (571,534 people) vs South Australia's Greater Adelaide (1,491,015). Greater Adelaide's population is 2.6 times (161%) larger than Portland-South Portland, ME metro area's.
History: Maine: Admitted to the Union on March 15, 1820, as the 23rd state. South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836. In its current form, Maine is the older of the two by 81 years.
Maine vs South Australia Economy
GDP: Maine's GDP is $99.2 billion (2024) vs South Australia's $100.2 billion. Maine and South Australia have about the same economic output.
GDP per capita: Maine: $70,586 per person vs South Australia: $52,511. Maine's GDP per capita is 1.3 times (34%) higher than South Australia's.
Official Websites
Maine official website · South Australia official website
More Size Comparisons
All Maine 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.