The map above shows Washington and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Washington vs South Australia Geography
Land area
- Washington has a land area of 66,455 square miles (172,119 km²), while South Australia has 380,048 square miles (984,321 km²).
- South Australia's land area is 5.7 times (472%) larger than Washington's.
Total area
- Washington: 71,301 square miles (184,668 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water.
- South Australia's total area is 5.3 times (433%) larger than Washington's.
Length
- Washington is 238 miles (383 km) long from north to south; South Australia is 1,078 miles (1,735 km).
- South Australia's north-south length is 4.5 times (353%) longer than Washington's.
Width
- Washington spans 399 miles (641 km) east to west; South Australia spans 825 miles (1,328 km).
- South Australia's east-west width is 2.1 times (107%) wider than Washington's.
Highest point
- Washington's highest point is Mount Rainier at 14,409 feet (4,392 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m).
- Mount Rainier is 9,701 feet higher than Mount Woodroffe.
Lowest point
- Washington'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.
Washington vs South Australia Population and History
Population
- Washington has a population of 7,958,180 (2024), while South Australia has 1,908,182 (2025).
- Washington's population is 4.2 times (317%) larger than South Australia's.
Population density
- Washington: 119.8 people per square mile vs South Australia: 5.0.
- Washington's population density is 24.0 times higher than South Australia's.
Largest metro area
- Washington's largest metropolitan area is Seattle-Tacoma-Bellevue, WA metro area (4,145,494 people) vs South Australia's Greater Adelaide (1,491,015).
- Seattle-Tacoma-Bellevue, WA metro area's population is 2.8 times (178%) larger than Greater Adelaide's.
History
- Washington: Admitted to the Union on November 11, 1889, as the 42nd state.
- South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836.
- In its current form, Washington is the older of the two by 12 years.
Washington vs South Australia Economy
GDP
- Washington's GDP is $856.0 billion (2024) vs South Australia's $100.2 billion.
- Washington's economic output is 8.5 times (754%) larger than South Australia's.
GDP per capita
- Washington: $107,564 per person vs South Australia: $52,511.
- Washington's GDP per capita is 2.0 times (105%) higher than South Australia's.
Official Websites
Washington official website · South Australia official website
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More Size Comparisons
All Washington 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.