Kansas City is about 2.4 times smaller than Jacksonville.

Jacksonville (map shows its 197 named neighbourhoods; the area covers the whole city) is approximately 1,935 sq km, while Kansas City (map shows its 145 named neighbourhoods; the area covers the whole city) is approximately 815 sq km, making Kansas City 42.09% the size of Jacksonville.
Tip: This to-scale comparison of Jacksonville vs. Kansas City uses the Mercator projection, which distorts the size of regions near the poles.
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