The map above shows Texas and South Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Texas vs South Australia Geography
Land area: Texas has a land area of 261,259 square miles (676,657 km²), while South Australia has 380,048 square miles (984,321 km²). South Australia's land area is 1.5 times (45%) larger than Texas'.
Total area: Texas: 268,599 square miles (695,668 km²) vs South Australia: 380,048 square miles (984,321 km²), including inland and coastal water. South Australia's total area is 1.4 times (41%) larger than Texas'.
Length: Texas is 808 miles (1,300 km) long from north to south; South Australia is 1,078 miles (1,735 km). South Australia's north-south length is 1.3 times (33%) longer than Texas'.
Width: Texas spans 777 miles (1,250 km) east to west; South Australia spans 825 miles (1,328 km). South Australia's east-west width is 1.1 times (6%) wider than Texas'.
Highest point: Texas's highest point is Guadalupe Peak at 8,730 feet (2,661 m); South Australia's is Mount Woodroffe at 4,708 feet (1,435 m). Guadalupe Peak is 4,022 feet higher than Mount Woodroffe.
Lowest point: Texas's lowest point is Gulf of Mexico at 0 feet; South Australia's is Lake Eyre at -49 feet. South Australia's lowest point is 49 feet lower.
Texas vs South Australia Population and History
Population: Texas has a population of 31,290,831 (2024), while South Australia has 1,908,182 (2025). Texas' population is 16.4 times larger than South Australia's.
Population density: Texas: 119.8 people per square mile vs South Australia: 5.0. Texas' population density is 24.0 times higher than South Australia's.
Largest metro area: Texas's largest metropolitan area is Dallas-Fort Worth-Arlington, TX metro area (8,344,032 people) vs South Australia's Greater Adelaide (1,491,015). Dallas-Fort Worth-Arlington, TX metro area's population is 5.6 times (460%) larger than Greater Adelaide's.
History: Texas: Admitted to the Union on December 29, 1845, as the 28th state. South Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1836. In its current form, Texas is the older of the two by 56 years.
Texas vs South Australia Economy
GDP: Texas's GDP is $2,769.8 billion (2024) vs South Australia's $100.2 billion. Texas' economic output is 27.6 times larger than South Australia's.
GDP per capita: Texas: $88,517 per person vs South Australia: $52,511. Texas' GDP per capita is 1.7 times (69%) higher than South Australia's.
Official Websites
Texas official website · South Australia official website
More Size Comparisons
All Texas 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.