City size comparison

compared to

Istanbul is about 77 times bigger than Boulder.

Boulder is approximately 70 sq km, while Istanbul is approximately 5,343 sq km, making Istanbul 7,575% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Istanbul uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Istanbul vs. Boulder

Flip Comparison · See true size
See Istanbul on top of Boulder
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Cost of Living Comparison · 7 categories - 2026 data
Boulder is 81.1% more expensive than Istanbul
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