The map above shows Guam and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Guam vs South Australia Geography
Land area
- Guam has a land area of 210 square miles (544 km²), while South Australia has 380,048 square miles (984,321 km²).
- South Australia's land area is 1,809.4 times larger than Guam's.
Total area
- Guam: 210 square miles (544 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water.
- South Australia's total area is 1,809.4 times larger than Guam's.
Length
- Guam is 27 miles (43 km) long from north to south; South Australia is 1,078 miles (1,735 km).
- South Australia's north-south length is 39.9 times longer than Guam's.
Width
- Guam spans 22 miles (35 km) east to west; South Australia spans 825 miles (1,328 km).
- South Australia's east-west width is 37.5 times wider than Guam's.
Highest point
- Guam's highest point is Mount Lamlam at 1,332 feet (406 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m).
- Mount Woodroffe is 3,376 feet higher than Mount Lamlam.
Lowest point
- Guam's lowest point is Pacific Ocean at 0 feet; South Australia's is Lake Eyre at -49 feet.
- South Australia's lowest point is 49 feet lower.
Guam vs South Australia Population and History
Population
- Guam has a population of 153,836 (2020), while South Australia has 1,908,182 (2025).
- South Australia's population is 12.4 times larger than Guam's.
Population density
- Guam: 732.6 people per square mile vs South Australia: 5.0.
- Guam's population density is 146.5 times higher than South Australia's.
History
- Guam: A US territory since 1898.
- South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836.
- In its current form, Guam is the older of the two by 3 years.
Official Websites
Guam official website · South Australia official website
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More Size Comparisons
All Guam 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.