The map above shows Pennsylvania and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Pennsylvania vs South Australia Geography
Land area: Pennsylvania has a land area of 44,742 square miles (115,882 km²), while South Australia has 380,048 square miles (984,321 km²). South Australia's land area is 8.5 times (749%) larger than Pennsylvania's.
Total area: Pennsylvania: 46,054 square miles (119,279 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water. South Australia's total area is 8.3 times (725%) larger than Pennsylvania's.
Length: Pennsylvania is 284 miles (458 km) long from north to south; South Australia is 1,078 miles (1,735 km). South Australia's north-south length is 3.8 times (280%) longer than Pennsylvania's.
Width: Pennsylvania spans 307 miles (495 km) east to west; South Australia spans 825 miles (1,328 km). South Australia's east-west width is 2.7 times (169%) wider than Pennsylvania's.
Highest point: Pennsylvania's highest point is Mount Davis at 3,210 feet (978 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m). Mount Woodroffe is 1,498 feet higher than Mount Davis.
Lowest point: Pennsylvania's lowest point is Delaware River at 0 feet; South Australia's is Lake Eyre at -49 feet. South Australia's lowest point is 49 feet lower.
Pennsylvania vs South Australia Population and History
Population: Pennsylvania has a population of 13,078,751 (2024), while South Australia has 1,908,182 (2025). Pennsylvania's population is 6.9 times (585%) larger than South Australia's.
Population density: Pennsylvania: 292.3 people per square mile vs South Australia: 5.0. Pennsylvania's population density is 58.5 times higher than South Australia's.
Largest metro area: Pennsylvania's largest metropolitan area is Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area (6,330,422 people) vs South Australia's Greater Adelaide (1,491,015). Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area's population is 4.2 times (325%) larger than Greater Adelaide's.
History: Pennsylvania: Admitted to the Union on December 12, 1787, as the 2nd state. South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836. In its current form, Pennsylvania is the older of the two by 114 years.
Pennsylvania vs South Australia Economy
GDP: Pennsylvania's GDP is $1,007.9 billion (2024) vs South Australia's $100.2 billion. Pennsylvania's economic output is 10.1 times larger than South Australia's.
GDP per capita: Pennsylvania: $77,062 per person vs South Australia: $52,511. Pennsylvania's GDP per capita is 1.5 times (47%) higher than South Australia's.
Official Websites
Pennsylvania official website · South Australia official website
More Size Comparisons
All Pennsylvania 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.