Red Deer is about 6 times smaller than Chicago.

Chicago is approximately 590 sq km, while Red Deer (map shows its 83 named neighbourhoods; the area covers the whole city) is approximately 105 sq km, making Red Deer 17.76% the size of Chicago.
Tip: This to-scale comparison of Chicago vs. Red Deer uses the Mercator projection, which distorts the size of regions near the poles.
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