The map above shows New Zealand and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Zealand vs South Australia Geography
Land area
- New Zealand has a land area of 102,138 square miles (264,537 km²), while South Australia has 380,048 square miles (984,321 km²).
- South Australia's land area is 3.7 times (272%) larger than New Zealand's.
Total area
- New Zealand: 103,799 square miles (268,838 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water.
- South Australia's total area is 3.7 times (266%) larger than New Zealand's.
Length
- New Zealand is 1,185 miles (1,908 km) long from north to south; South Australia is 1,078 miles (1,735 km).
- New Zealand's north-south length is 1.1 times (10%) longer than South Australia's.
Width
- New Zealand spans 969 miles (1,559 km) east to west; South Australia spans 825 miles (1,328 km).
- New Zealand's east-west width is 1.2 times (17%) wider than South Australia's.
Highest point
- New Zealand's highest point is Aoraki / Mount Cook at 12,218 feet (3,724 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m).
- Aoraki / Mount Cook is 7,510 feet higher than Mount Woodroffe.
Lowest point
- New Zealand's lowest point is Taieri Plains at -7 feet; South Australia's is Lake Eyre at -49 feet.
- South Australia's lowest point is 42 feet lower.
New Zealand vs South Australia Population and History
Population
- New Zealand has a population of 5,357,300 (2026), while South Australia has 1,908,182 (2025).
- New Zealand's population is 2.8 times (181%) larger than South Australia's.
Population density
- New Zealand: 52.5 people per square mile vs South Australia: 5.0.
- New Zealand's population density is 10.5 times higher than South Australia's.
Largest metro area
- New Zealand's largest metropolitan area is Auckland Region (1,715,600 people) vs South Australia's Greater Adelaide (1,491,015).
- Auckland Region's population is 1.2 times (15%) larger than Greater Adelaide's.
History
- New Zealand: A dominion from September 26, 1907; fully independent by statute in 1947.
- 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.
New Zealand vs South Australia Economy
GDP
- New Zealand's GDP is $264.1 billion (2025) vs South Australia's $100.2 billion.
- New Zealand's economic output is 2.6 times (164%) larger than South Australia's.
GDP per capita
- New Zealand: $49,591 per person vs South Australia: $52,511.
- South Australia's GDP per capita is 1.1 times (6%) higher than New Zealand's.
Official Websites
New Zealand official website · South Australia official website
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More Size Comparisons
All New Zealand 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.