Dusseldorf is around the same size as Madison.

Madison (map shows its 124 named neighbourhoods; the area covers the whole city) is approximately 217 sq km, while Dusseldorf is approximately 217 sq km, making Dusseldorf 0% larger than Madison.
Tip: This to-scale comparison of Madison vs. Dusseldorf uses the Mercator projection, which distorts the size of regions near the poles.
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