Newark is about 1.4 times bigger than Helena.

Helena (map shows its 6 named neighbourhoods; the area covers the whole city) is approximately 44 sq km, while Newark (map shows its 20 named neighbourhoods; the area covers the whole city) is approximately 63 sq km, making Newark 41% larger than Helena.
Tip: This to-scale comparison of Helena vs. Newark uses the Mercator projection, which distorts the size of regions near the poles.
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