The map above shows New Jersey and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Jersey vs South Australia Geography
Land area
- New Jersey has a land area of 7,355 square miles (19,049 km²), while South Australia has 380,048 square miles (984,321 km²).
- South Australia's land area is 51.7 times larger than New Jersey's.
Total area
- New Jersey: 8,719 square miles (22,583 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water.
- South Australia's total area is 43.6 times larger than New Jersey's.
Length
- New Jersey is 169 miles (271 km) long from north to south; South Australia is 1,078 miles (1,735 km).
- South Australia's north-south length is 6.4 times (538%) longer than New Jersey's.
Width
- New Jersey spans 129 miles (207 km) east to west; South Australia spans 825 miles (1,328 km).
- South Australia's east-west width is 6.4 times (540%) wider than New Jersey's.
Highest point
- New Jersey's highest point is High Point at 1,798 feet (548 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m).
- Mount Woodroffe is 2,910 feet higher than High Point.
Lowest point
- New Jersey's lowest point is Atlantic Ocean at 0 feet; South Australia's is Lake Eyre at -49 feet.
- South Australia's lowest point is 49 feet lower.
New Jersey vs South Australia Population and History
Population
- New Jersey has a population of 9,500,851 (2024), while South Australia has 1,908,182 (2025).
- New Jersey's population is 5.0 times (398%) larger than South Australia's.
Population density
- New Jersey: 1,291.8 people per square mile vs South Australia: 5.0.
- New Jersey's population density is 258.4 times higher than South Australia's.
Largest metro area
- New Jersey's largest metropolitan area is New York-Newark-Jersey City, NY-NJ metro area (19,940,274 people) vs South Australia's Greater Adelaide (1,491,015).
- New York-Newark-Jersey City, NY-NJ metro area's population is 13.4 times larger than Greater Adelaide's.
History
- New Jersey: Admitted to the Union on December 18, 1787, as the 3rd state.
- South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836.
- In its current form, New Jersey is the older of the two by 114 years.
New Jersey vs South Australia Economy
GDP
- New Jersey's GDP is $846.0 billion (2024) vs South Australia's $100.2 billion.
- New Jersey's economic output is 8.4 times (744%) larger than South Australia's.
GDP per capita
- New Jersey: $89,045 per person vs South Australia: $52,511.
- New Jersey's GDP per capita is 1.7 times (70%) higher than South Australia's.
Official Websites
New Jersey official website · South Australia official website
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More Size Comparisons
All New Jersey 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.