City size comparison

compared to

Athens is about 6 times bigger than Boulder.

Boulder is approximately 70 sq km, while Athens (map shows its 34 named neighbourhoods; the area covers the whole city) is approximately 412 sq km, making Athens 492% larger than Boulder.
Tip: This to-scale comparison of Boulder vs. Athens uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Athens vs. Boulder

Flip Comparison · See true size
See Athens on top of Boulder
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Cost of Living Comparison · 7 categories - 2026 data
Boulder is 67.8% more expensive than Athens
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