The map above shows Northern Territory and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Northern Territory vs Ontario Geography
Land area: Northern Territory has a land area of 520,902 square miles (1,349,129 km²), while Ontario has 354,342 square miles (917,741 km²). Northern Territory's land area is 1.5 times (47%) larger than Ontario's.
Total area: Northern Territory: 520,902 square miles (1,349,129 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Northern Territory's total area is 1.3 times (25%) larger than Ontario's.
Length: Northern Territory is 1,092 miles (1,758 km) long from north to south; Ontario is 1,085 miles (1,747 km). Northern Territory and Ontario have about the same north-south length.
Width: Northern Territory spans 610 miles (981 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 1.7 times (66%) wider than Northern Territory's.
Highest point: Northern Territory's highest point is Mount Zeil at 5,023 feet (1,531 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Mount Zeil is 2,749 feet higher than Ishpatina Ridge.
Lowest point: Northern Territory's lowest point is Timor Sea at 0 feet; Ontario's is Hudson Bay at 0 feet. Both lowest points are at or near sea level.
Northern Territory vs Ontario Population and History
Population: Northern Territory has a population of 265,457 (2025), while Ontario has 16,136,480 (2026). Ontario's population is 60.8 times larger than Northern Territory's.
Population density: Northern Territory: 0.5 people per square mile vs Ontario: 45.5. Ontario's population density is 91.0 times higher than Northern Territory's.
Largest metro area: Northern Territory's largest metropolitan area is Greater Darwin (159,284 people) vs Ontario's Toronto CMA (6,202,225). Toronto CMA's population is 38.9 times larger than Greater Darwin's.
History: Northern Territory: Became a federal territory on January 1, 1911; self-governing since 1978. 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.
Northern Territory vs Ontario Economy
GDP: Northern Territory's GDP is $22.4 billion (2025) vs Ontario's $873.9 billion. Ontario's economic output is 39.0 times larger than Northern Territory's.
GDP per capita: Northern Territory: $84,383 per person vs Ontario: $54,132. Northern Territory's GDP per capita is 1.6 times (56%) higher than Ontario's.
Official Websites
Northern Territory official website · Ontario official website
More Size Comparisons
All Northern 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.