City size comparison

compared to

Sydney is about 15 times smaller than Cologne.

Cologne is approximately 405 sq km, while Sydney is approximately 27 sq km, making Sydney 6.59% the size of Cologne.
Tip: This to-scale comparison of Cologne vs. Sydney uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Sydney vs. Cologne

Flip Comparison · See true size
See Sydney on top of Cologne
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Cost of Living Comparison · 7 categories - 2026 data
Cologne is 0.5% cheaper than Sydney
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