Helena is about 3 times smaller than Fargo.

Fargo (map shows its 38 named neighbourhoods; the area covers the whole city) is approximately 133 sq km, while Helena (map shows its 6 named neighbourhoods; the area covers the whole city) is approximately 44 sq km, making Helena 33.35% the size of Fargo.
Tip: This to-scale comparison of Fargo vs. Helena uses the Mercator projection, which distorts the size of regions near the poles.
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