The map above shows Washington and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Washington vs Ontario Geography
Land area
- Washington has a land area of 66,455 square miles (172,119 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 5.3 times (433%) larger than Washington's.
Total area
- Washington: 71,301 square miles (184,668 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 5.8 times (483%) larger than Washington's.
Length
- Washington is 238 miles (383 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 4.6 times (356%) longer than Washington's.
Width
- Washington spans 399 miles (641 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 2.5 times (154%) wider than Washington's.
Highest point
- Washington's highest point is Mount Rainier at 14,409 feet (4,392 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Mount Rainier is 12,135 feet higher than Ishpatina Ridge.
Lowest point
- Washington's lowest point is Pacific Ocean at 0 feet; Ontario's is Hudson Bay at 0 feet.
- Both lowest points are at or near sea level.
Washington vs Ontario Population and History
Population
- Washington has a population of 7,958,180 (2024), while Ontario has 16,136,480 (2026).
- Ontario's population is 2.0 times (103%) larger than Washington's.
Population density
- Washington: 119.8 people per square mile vs Ontario: 45.5.
- Washington's population density is 2.6 times (163%) higher than Ontario's.
Biggest city
- Washington's biggest city is Seattle with 780,995 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 3.6 times (258%) larger than Seattle's.
Largest metro area
- Washington's largest metropolitan area is Seattle-Tacoma-Bellevue, WA metro area (4,145,494 people) vs Ontario's Toronto CMA (6,202,225).
- Toronto CMA's population is 1.5 times (50%) larger than Seattle-Tacoma-Bellevue, WA metro area's.
History
- Washington: Admitted to the Union on November 11, 1889, as the 42nd state.
- 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 22 years.
Washington vs Ontario Economy
GDP
- Washington's GDP is $856.0 billion (2024) vs Ontario's $873.9 billion.
- Washington and Ontario have about the same economic output.
GDP per capita
- Washington: $107,564 per person vs Ontario: $54,132.
- Washington's GDP per capita is 2.0 times (99%) higher than Ontario's.
Official Websites
Washington official website · Ontario official website
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More Size Comparisons
All Washington 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.