The map above shows New Zealand and Western Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Zealand vs Western Australia Geography
Land area: New Zealand has a land area of 102,138 square miles (264,537 km²), while Western Australia has 975,685 square miles (2,527,013 km²). Western Australia's land area is 9.6 times (855%) larger than New Zealand's.
Total area: New Zealand: 103,799 square miles (268,838 km²) vs Western Australia: 975,685 square miles (2,527,013 km²), including inland and coastal water. Western Australia's total area is 9.4 times (840%) larger than New Zealand's.
Length: New Zealand is 1,185 miles (1,908 km) long from north to south; Western Australia is 1,590 miles (2,558 km). Western Australia's north-south length is 1.3 times (34%) longer than New Zealand's.
Width: New Zealand spans 969 miles (1,559 km) east to west; Western Australia spans 1,286 miles (2,069 km). Western Australia's east-west width is 1.3 times (33%) wider than New Zealand's.
Highest point: New Zealand's highest point is Aoraki / Mount Cook at 12,218 feet (3,724 m); Western Australia's is Mount Meharry at 4,098 feet (1,249 m). Aoraki / Mount Cook is 8,120 feet higher than Mount Meharry.
Lowest point: New Zealand's lowest point is Taieri Plains at -7 feet; Western Australia's is Indian Ocean at 0 feet. New Zealand's lowest point is 7 feet lower.
New Zealand vs Western Australia Population and History
Population: New Zealand has a population of 5,357,300 (2026), while Western Australia has 3,061,672 (2025). New Zealand's population is 1.7 times (75%) larger than Western Australia's.
Population density: New Zealand: 52.5 people per square mile vs Western Australia: 3.1. New Zealand's population density is 16.9 times higher than Western Australia's.
Largest metro area: New Zealand's largest metropolitan area is Auckland Region (1,715,600 people) vs Western Australia's Greater Perth (2,452,765). Greater Perth's population is 1.4 times (43%) larger than Auckland Region's.
History: New Zealand: A dominion from September 26, 1907; fully independent by statute in 1947. Western Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1829. In its current form, Western Australia is the older of the two by 6 years.
New Zealand vs Western Australia Economy
GDP: New Zealand's GDP is $264.1 billion (2025) vs Western Australia's $304.6 billion. Western Australia's economic output is 1.2 times (15%) larger than New Zealand's.
GDP per capita: New Zealand: $49,591 per person vs Western Australia: $99,488. Western Australia's GDP per capita is 2.0 times (101%) higher than New Zealand's.
Official Websites
New Zealand official website · Western Australia official website
More Size Comparisons
All New Zealand size comparisons · All Western 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.