The map above shows Alberta and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Alberta vs Ontario Geography
Land area
- Alberta has a land area of 248,000 square miles (642,317 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 1.4 times (43%) larger than Alberta's.
Total area
- Alberta: 255,541 square miles (661,848 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 1.6 times (63%) larger than Alberta's.
Length
- Alberta is 810 miles (1,303 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 1.3 times (34%) longer than Alberta's.
Width
- Alberta spans 544 miles (876 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 1.9 times (86%) wider than Alberta's.
Highest point
- Alberta's highest point is Mount Columbia at 12,293 feet (3,747 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Mount Columbia is 10,019 feet higher than Ishpatina Ridge.
Lowest point
- Alberta's lowest point is Slave River at 499 feet; Ontario's is Hudson Bay at 0 feet.
- Ontario's lowest point is 499 feet lower.
Alberta vs Ontario Population and History
Population
- Alberta has a population of 5,048,151 (2026), while Ontario has 16,136,480 (2026).
- Ontario's population is 3.2 times (220%) larger than Alberta's.
Population density
- Alberta: 20.4 people per square mile vs Ontario: 45.5.
- Ontario's population density is 2.2 times (123%) higher than Alberta's.
Biggest city
- Alberta's biggest city is Calgary with 1,306,784 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 2.1 times (114%) larger than Calgary's.
Largest metro area
- Alberta's largest metropolitan area is Calgary CMA (1,481,806 people) vs Ontario's Toronto CMA (6,202,225).
- Toronto CMA's population is 4.2 times (319%) larger than Calgary CMA's.
History
- Alberta: Joined Confederation on September 1, 1905.
- 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 38 years.
Alberta vs Ontario Economy
GDP
- Alberta's GDP is $346.0 billion (2024) vs Ontario's $873.9 billion.
- Ontario's economic output is 2.5 times (153%) larger than Alberta's.
GDP per capita
- Alberta: $70,487 per person vs Ontario: $54,132.
- Alberta's GDP per capita is 1.3 times (30%) higher than Ontario's.
Official Websites
Alberta official website · Ontario official website
Download the Alberta vs Ontario Size Comparison Map for free
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More Size Comparisons
All Alberta 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.