The map above shows Puerto Rico and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Puerto Rico vs South Australia Geography
Land area: Puerto Rico has a land area of 3,424 square miles (8,868 km²), while South Australia has 380,048 square miles (984,321 km²). South Australia's land area is 111.0 times larger than Puerto Rico's.
Total area: Puerto Rico: 3,515 square miles (9,104 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water. South Australia's total area is 108.1 times larger than Puerto Rico's.
Length: Puerto Rico is 67 miles (107 km) long from north to south; South Australia is 1,078 miles (1,735 km). South Australia's north-south length is 16.1 times longer than Puerto Rico's.
Width: Puerto Rico spans 174 miles (279 km) east to west; South Australia spans 825 miles (1,328 km). South Australia's east-west width is 4.7 times (374%) wider than Puerto Rico's.
Highest point: Puerto Rico's highest point is Cerro de Punta at 4,390 feet (1,338 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m). Mount Woodroffe is 318 feet higher than Cerro de Punta.
Lowest point: Puerto Rico'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.
Puerto Rico vs South Australia Population and History
Population: Puerto Rico has a population of 3,285,874 (2020), while South Australia has 1,908,182 (2025). Puerto Rico's population is 1.7 times (72%) larger than South Australia's.
Population density: Puerto Rico: 959.7 people per square mile vs South Australia: 5.0. Puerto Rico's population density is 191.9 times higher than South Australia's.
Largest metro area: Puerto Rico's largest metropolitan area is San Juan metro area (2,233,177 people) vs South Australia's Greater Adelaide (1,491,015). San Juan metro area's population is 1.5 times (50%) larger than Greater Adelaide's.
History: Puerto Rico: A US territory since 1898; a commonwealth since 1952. South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836. In its current form, Puerto Rico is the older of the two by 3 years.
Puerto Rico vs South Australia Economy
GDP: Puerto Rico's GDP is $129.0 billion (2025) vs South Australia's $100.2 billion. Puerto Rico's economic output is 1.3 times (29%) larger than South Australia's.
GDP per capita: Puerto Rico: $40,650 per person vs South Australia: $52,511. South Australia's GDP per capita is 1.3 times (29%) higher than Puerto Rico's.
Official Websites
Puerto Rico official website · South Australia official website
More Size Comparisons
All Puerto Rico 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.