City size comparison

compared to

Ottawa is about 18 times bigger than Washington.

Washington is approximately 158 sq km, while Ottawa is approximately 2,779 sq km, making Ottawa 1,655% larger than Washington.
Tip: This to-scale comparison of Washington vs. Ottawa uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Ottawa vs. Washington

Flip Comparison · See true size
See Ottawa on top of Washington
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Cost of Living Comparison · 7 categories - 2026 data
Washington is 52.6% more expensive than Ottawa
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