Newark is about 4.6 times smaller than Salt Lake City.

Salt Lake City is approximately 287 sq km, while Newark (map shows its 20 named neighbourhoods; the area covers the whole city) is approximately 63 sq km, making Newark 21.77% the size of Salt Lake City.
Tip: This to-scale comparison of Salt Lake City vs. Newark uses the Mercator projection, which distorts the size of regions near the poles.
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