The map above shows Australian Capital Territory and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Australian Capital Territory vs Ontario Geography
Land area: Australian Capital Territory has a land area of 910 square miles (2,358 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 389.2 times larger than Australian Capital Territory's.
Total area: Australian Capital Territory: 910 square miles (2,358 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 456.5 times larger than Australian Capital Territory's.
Length: Australian Capital Territory is 54 miles (87 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 20.1 times longer than Australian Capital Territory's.
Width: Australian Capital Territory spans 38 miles (61 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 26.7 times wider than Australian Capital Territory's.
Highest point: Australian Capital Territory's highest point is Bimberi Peak at 6,273 feet (1,912 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Bimberi Peak is 3,999 feet higher than Ishpatina Ridge.
Lowest point: Australian Capital Territory's lowest point is Molonglo River at 1,407 feet; Ontario's is Hudson Bay at 0 feet. Ontario's lowest point is 1,407 feet lower.
Australian Capital Territory vs Ontario Population and History
Population: Australian Capital Territory has a population of 486,231 (2025), while Ontario has 16,136,480 (2026). Ontario's population is 33.2 times larger than Australian Capital Territory's.
Population density: Australian Capital Territory: 534.3 people per square mile vs Ontario: 45.5. Australian Capital Territory's population density is 11.7 times higher than Ontario's.
Largest metro area: Australian Capital Territory's largest metropolitan area is Greater Canberra (486,231 people) vs Ontario's Toronto CMA (6,202,225). Toronto CMA's population is 12.8 times larger than Greater Canberra's.
History: Australian Capital Territory: Established as the Federal Capital Territory on January 1, 1911. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, Ontario is the older of the two by 44 years.
Australian Capital Territory vs Ontario Economy
GDP: Australian Capital Territory's GDP is $38.0 billion (2025) vs Ontario's $873.9 billion. Ontario's economic output is 23.0 times larger than Australian Capital Territory's.
GDP per capita: Australian Capital Territory: $78,152 per person vs Ontario: $54,132. Australian Capital Territory's GDP per capita is 1.4 times (44%) higher than Ontario's.
Official Websites
Australian Capital Territory official website · Ontario official website
More Size Comparisons
All Australian Capital Territory size comparisons · All Ontario 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.