The map above shows District of Columbia and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
District of Columbia vs Ontario Geography
Land area
- District of Columbia has a land area of 61 square miles (158 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 5,808.5 times larger than District of Columbia's.
Total area
- District of Columbia: 68 square miles (177 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 6,081.3 times larger than District of Columbia's.
Length
- District of Columbia is 13 miles (22 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 83.5 times longer than District of Columbia's.
Width
- District of Columbia spans 12 miles (19 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 84.4 times wider than District of Columbia's.
Highest point
- District of Columbia's highest point is Fort Reno at 429 feet (131 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Ishpatina Ridge is 1,845 feet higher than Fort Reno.
Lowest point
- District of Columbia's lowest point is Potomac River at 0 feet; Ontario's is Hudson Bay at 0 feet.
- Both lowest points are at or near sea level.
District of Columbia vs Ontario Population and History
Population
- District of Columbia has a population of 702,250 (2024), while Ontario has 16,136,480 (2026).
- Ontario's population is 23.0 times larger than District of Columbia's.
Population density
- District of Columbia: 11,493.5 people per square mile vs Ontario: 45.5.
- District of Columbia's population density is 252.6 times higher than Ontario's.
Biggest city
- District of Columbia's biggest city is Washington with 702,250 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 4.0 times (298%) larger than Washington's.
Largest metro area
- District of Columbia's largest metropolitan area is Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489 people) vs Ontario's Toronto CMA (6,202,225).
- Washington-Arlington-Alexandria, DC-VA-MD-WV metro area and Toronto CMA have about the same population.
History
- District of Columbia: The federal district, established by the Residence Act on July 16, 1790; not a state.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, District of Columbia is the older of the two by 77 years.
District of Columbia vs Ontario Economy
GDP
- District of Columbia's GDP is $184.3 billion (2024) vs Ontario's $873.9 billion.
- Ontario's economic output is 4.7 times (374%) larger than District of Columbia's.
GDP per capita
- District of Columbia: $262,439 per person vs Ontario: $54,132.
- District of Columbia's GDP per capita is 4.8 times (385%) higher than Ontario's.
Official Websites
District of Columbia official website · Ontario official website
Download the District of Columbia vs Ontario Size Comparison Map for free
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More Size Comparisons
All District of Columbia 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.