The map above shows Oklahoma and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Oklahoma vs South Australia Geography
Land area
- Oklahoma has a land area of 68,597 square miles (177,665 km²), while South Australia has 380,048 square miles (984,321 km²).
- South Australia's land area is 5.5 times (454%) larger than Oklahoma's.
Total area
- Oklahoma: 69,899 square miles (181,038 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water.
- South Australia's total area is 5.4 times (444%) larger than Oklahoma's.
Length
- Oklahoma is 533 miles (857 km) long from north to south; South Australia is 1,078 miles (1,735 km).
- South Australia's north-south length is 2.0 times (102%) longer than Oklahoma's.
Width
- Oklahoma spans 490 miles (789 km) east to west; South Australia spans 825 miles (1,328 km).
- South Australia's east-west width is 1.7 times (68%) wider than Oklahoma's.
Highest point
- Oklahoma's highest point is Black Mesa at 4,980 feet (1,518 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m).
- Black Mesa is 272 feet higher than Mount Woodroffe.
Lowest point
- Oklahoma's lowest point is Little River at 289 feet; South Australia's is Lake Eyre at -49 feet.
- South Australia's lowest point is 338 feet lower.
Oklahoma vs South Australia Population and History
Population
- Oklahoma has a population of 4,095,393 (2024), while South Australia has 1,908,182 (2025).
- Oklahoma's population is 2.1 times (115%) larger than South Australia's.
Population density
- Oklahoma: 59.7 people per square mile vs South Australia: 5.0.
- Oklahoma's population density is 11.9 times higher than South Australia's.
Largest metro area
- Oklahoma's largest metropolitan area is Oklahoma City, OK metro area (1,497,821 people) vs South Australia's Greater Adelaide (1,491,015).
- Oklahoma City, OK metro area and Greater Adelaide have about the same population.
History
- Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state.
- South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836.
- In its current form, South Australia is the older of the two by 6 years.
Oklahoma vs South Australia Economy
GDP
- Oklahoma's GDP is $263.7 billion (2024) vs South Australia's $100.2 billion.
- Oklahoma's economic output is 2.6 times (163%) larger than South Australia's.
GDP per capita
- Oklahoma: $64,388 per person vs South Australia: $52,511.
- Oklahoma's GDP per capita is 1.2 times (23%) higher than South Australia's.
Official Websites
Oklahoma official website · South Australia official website
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More Size Comparisons
All Oklahoma 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.