The map above shows Ontario and Tasmania side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Ontario vs Tasmania Geography
Land area: Ontario has a land area of 354,342 square miles (917,741 km²), while Tasmania has 26,410 square miles (68,401 km²). Ontario's land area is 13.4 times larger than Tasmania's.
Total area: Ontario: 415,598 square miles (1,076,395 km²) vs Tasmania: 26,410 square miles (68,401 km²), including inland and coastal water. Ontario's total area is 15.7 times larger than Tasmania's.
Length: Ontario is 1,085 miles (1,747 km) long from north to south; Tasmania is 318 miles (511 km). Ontario's north-south length is 3.4 times (241%) longer than Tasmania's.
Width: Ontario spans 1,013 miles (1,630 km) east to west; Tasmania spans 248 miles (399 km). Ontario's east-west width is 4.1 times (308%) wider than Tasmania's.
Highest point: Ontario's highest point is Ishpatina Ridge at 2,274 feet (693 m); Tasmania's is Mount Ossa at 5,305 feet (1,617 m). Mount Ossa is 3,031 feet higher than Ishpatina Ridge.
Lowest point: Ontario's lowest point is Hudson Bay at 0 feet; Tasmania's is Southern Ocean at 0 feet. Both lowest points are at or near sea level.
Ontario vs Tasmania Population and History
Population: Ontario has a population of 16,136,480 (2026), while Tasmania has 576,659 (2025). Ontario's population is 28.0 times larger than Tasmania's.
Population density: Ontario: 45.5 people per square mile vs Tasmania: 21.8. Ontario's population density is 2.1 times (109%) higher than Tasmania's.
Largest metro area: Ontario's largest metropolitan area is Toronto CMA (6,202,225 people) vs Tasmania's Greater Hobart (255,250). Toronto CMA's population is 24.3 times larger than Greater Hobart's.
History: Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. Tasmania: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1825. In its current form, Ontario is the older of the two by 34 years.
Ontario vs Tasmania Economy
GDP: Ontario's GDP is $873.9 billion (2024) vs Tasmania's $28.3 billion. Ontario's economic output is 30.9 times larger than Tasmania's.
GDP per capita: Ontario: $54,132 per person vs Tasmania: $49,076. Ontario's GDP per capita is 1.1 times (10%) higher than Tasmania's.
Official Websites
Ontario official website · Tasmania official website
More Size Comparisons
All Ontario size comparisons · All Tasmania 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.