The map above shows Northern Ireland and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Northern Ireland vs Ontario Geography
Land area
- Northern Ireland has a land area of 5,236 square miles (13,562 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 67.7 times larger than Northern Ireland's.
Total area
- Northern Ireland: 5,456 square miles (14,130 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 76.2 times larger than Northern Ireland's.
Length
- Northern Ireland is 83 miles (134 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 13.1 times longer than Northern Ireland's.
Width
- Northern Ireland spans 107 miles (173 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 9.5 times (847%) wider than Northern Ireland's.
Highest point
- Northern Ireland's highest point is Slieve Donard at 2,789 feet (850 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Slieve Donard is 515 feet higher than Ishpatina Ridge.
Lowest point
- Northern Ireland's lowest point is Irish Sea at 0 feet; Ontario's is Hudson Bay at 0 feet.
- Both lowest points are at or near sea level.
Northern Ireland vs Ontario Population and History
Population
- Northern Ireland has a population of 1,905,000 (2022), while Ontario has 16,136,480 (2026).
- Ontario's population is 8.5 times (747%) larger than Northern Ireland's.
Population density
- Northern Ireland: 363.8 people per square mile vs Ontario: 45.5.
- Northern Ireland's population density is 8.0 times (700%) higher than Ontario's.
Biggest city
- Northern Ireland's biggest city is Belfast with 348,005 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 8.0 times (703%) larger than Belfast's.
History
- Northern Ireland: A country within the United Kingdom; created by the partition of Ireland on May 3, 1921.
- 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 54 years.
Northern Ireland vs Ontario Economy
GDP
- Northern Ireland's GDP is $58.8 billion (2022) vs Ontario's $873.9 billion.
- Ontario's economic output is 14.9 times larger than Northern Ireland's.
GDP per capita
- Northern Ireland: $30,686 per person vs Ontario: $54,132.
- Ontario's GDP per capita is 1.8 times (76%) higher than Northern Ireland's.
Official Websites
Northern Ireland official website · Ontario official website
Download the Northern Ireland vs Ontario Size Comparison Map for free
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More Size Comparisons
All Northern 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.