The map above shows United States and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
United States vs Ontario Geography
Land area
- United States has a land area of 3,533,467 square miles (9,151,637 km²), while Ontario has 354,342 square miles (917,741 km²).
- United States' land area is 10.0 times (897%) larger than Ontario's.
Total area
- United States: 3,802,784 square miles (9,849,165 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- United States' total area is 9.2 times (815%) larger than Ontario's.
Length
- United States is 3,628 miles (5,839 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- United States' north-south length is 3.3 times (234%) longer than Ontario's.
Width
- United States spans 4,824 miles (7,763 km) east to west; Ontario spans 1,013 miles (1,630 km).
- United States' east-west width is 4.8 times (376%) wider than Ontario's.
Highest point
- United States's highest point is Denali at 20,308 feet (6,190 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Denali is 18,034 feet higher than Ishpatina Ridge.
Lowest point
- United States's lowest point is Death Valley at -279 feet; Ontario's is Hudson Bay at 0 feet.
- United States's lowest point is 279 feet lower.
United States vs Ontario Population and History
Population
- United States has a population of 340,110,988 (2024), while Ontario has 16,136,480 (2026).
- United States' population is 21.1 times larger than Ontario's.
Population density
- United States: 96.3 people per square mile vs Ontario: 45.5.
- United States' population density is 2.1 times (112%) higher than Ontario's.
Biggest city
- United States's biggest city is New York with 8,478,072 people; Ontario's is Toronto with 2,794,356.
- New York's population is 3.0 times (203%) larger than Toronto's.
Largest metro area
- United States's largest metropolitan area is New York-Newark-Jersey City, NY-NJ metro area (19,940,274 people) vs Ontario's Toronto CMA (6,202,225).
- New York-Newark-Jersey City, NY-NJ metro area's population is 3.2 times (222%) larger than Toronto CMA's.
History
- United States: Declared independence on July 4, 1776.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, United States is the older of the two by 91 years.
United States vs Ontario Economy
GDP
- United States's GDP is $30,769.7 billion (2025) vs Ontario's $873.9 billion.
- United States' economic output is 35.2 times larger than Ontario's.
GDP per capita
- United States: $89,599 per person vs Ontario: $54,132.
- United States' GDP per capita is 1.7 times (66%) higher than Ontario's.
Official Websites
United States official website · Ontario official website
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More Size Comparisons
All United States 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.