City size comparison

compared to

Cologne is about 15 times bigger than Sydney.

Sydney is approximately 27 sq km, while Cologne is approximately 405 sq km, making Cologne 1,417% larger than Sydney.
Tip: This to-scale comparison of Sydney vs. Cologne uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Cologne vs. Sydney

Flip Comparison · See true size
See Cologne on top of Sydney
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Cost of Living Comparison · 7 categories - 2026 data
Sydney is 24.0% more expensive than Cologne
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