Salt Lake City is about 2.1 times bigger than Fargo.

Fargo (map shows its 38 named neighbourhoods; the area covers the whole city) is approximately 133 sq km, while Salt Lake City is approximately 287 sq km, making Salt Lake City 115% larger than Fargo.
Tip: This to-scale comparison of Fargo vs. Salt Lake City uses the Mercator projection, which distorts the size of regions near the poles.
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