The map above shows Ohio and Western Australia side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Ohio vs Western Australia Geography
Land area: Ohio has a land area of 40,859 square miles (105,824 km²), while Western Australia has 975,685 square miles (2,527,013 km²). Western Australia's land area is 23.9 times larger than Ohio's.
Total area: Ohio: 44,826 square miles (116,098 km²) vs Western Australia: 975,685 square miles (2,527,013 km²), including inland and coastal water. Western Australia's total area is 21.8 times larger than Ohio's.
Length: Ohio is 291 miles (468 km) long from north to south; Western Australia is 1,590 miles (2,558 km). Western Australia's north-south length is 5.5 times (446%) longer than Ohio's.
Width: Ohio spans 317 miles (510 km) east to west; Western Australia spans 1,286 miles (2,069 km). Western Australia's east-west width is 4.1 times (306%) wider than Ohio's.
Highest point: Ohio's highest point is Campbell Hill at 1,547 feet (472 m); Western Australia's is Mount Meharry at 4,098 feet (1,249 m). Mount Meharry is 2,551 feet higher than Campbell Hill.
Lowest point: Ohio's lowest point is Ohio River at 455 feet; Western Australia's is Indian Ocean at 0 feet. Western Australia's lowest point is 455 feet lower.
Ohio vs Western Australia Population and History
Population: Ohio has a population of 11,883,304 (2024), while Western Australia has 3,061,672 (2025). Ohio's population is 3.9 times (288%) larger than Western Australia's.
Population density: Ohio: 290.8 people per square mile vs Western Australia: 3.1. Ohio's population density is 93.8 times higher than Western Australia's.
Largest metro area: Ohio's largest metropolitan area is Cincinnati, OH-KY-IN metro area (2,302,815 people) vs Western Australia's Greater Perth (2,452,765). Greater Perth's population is 1.1 times (7%) larger than Cincinnati, OH-KY-IN metro area's.
History: Ohio: Admitted to the Union on March 1, 1803, as the 17th state. Western Australia: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1829. In its current form, Ohio is the older of the two by 98 years.
Ohio vs Western Australia Economy
GDP: Ohio's GDP is $923.1 billion (2024) vs Western Australia's $304.6 billion. Ohio's economic output is 3.0 times (203%) larger than Western Australia's.
GDP per capita: Ohio: $77,684 per person vs Western Australia: $99,488. Western Australia's GDP per capita is 1.3 times (28%) higher than Ohio's.
Official Websites
Ohio official website · Western Australia official website
More Size Comparisons
All Ohio 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.