The map above shows Ireland and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Ireland vs Ontario Geography
Land area
- Ireland has a land area of 26,596 square miles (68,883 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 13.3 times larger than Ireland's.
Total area
- Ireland: 27,133 square miles (70,273 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 15.3 times larger than Ireland's.
Length
- Ireland is 287 miles (462 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 3.8 times (278%) longer than Ireland's.
Width
- Ireland spans 191 miles (308 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 5.3 times (430%) wider than Ireland's.
Highest point
- Ireland's highest point is Carrauntoohil at 3,406 feet (1,038 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Carrauntoohil is 1,132 feet higher than Ishpatina Ridge.
Lowest point
- Ireland's lowest point is Atlantic Ocean at 0 feet; Ontario's is Hudson Bay at 0 feet.
- Both lowest points are at or near sea level.
Ireland vs Ontario Population and History
Population
- Ireland has a population of 5,525,600 (2026), while Ontario has 16,136,480 (2026).
- Ontario's population is 2.9 times (192%) larger than Ireland's.
Population density
- Ireland: 207.8 people per square mile vs Ontario: 45.5.
- Ireland's population density is 4.6 times (357%) higher than Ontario's.
Biggest city
- Ireland's biggest city is Dublin with 592,713 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 4.7 times (371%) larger than Dublin's.
Largest metro area
- Ireland's largest metropolitan area is Greater Dublin Area (2,082,605 people) vs Ontario's Toronto CMA (6,202,225).
- Toronto CMA's population is 3.0 times (198%) larger than Greater Dublin Area's.
History
- Ireland: Independent since December 6, 1922, as the Irish Free State; a republic since 1949.
- 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 55 years.
Ireland vs Ontario Economy
GDP
- Ireland's GDP is $721.7 billion (2025) vs Ontario's $873.9 billion.
- Ontario's economic output is 1.2 times (21%) larger than Ireland's.
GDP per capita
- Ireland: $131,593 per person vs Ontario: $54,132.
- Ireland's GDP per capita is 2.4 times (143%) higher than Ontario's.
Official Websites
Ireland official website · Ontario official website
Download the Ireland vs Ontario Size Comparison Map for free
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More Size Comparisons
All Ireland 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.