Jackson is about 4.6 times bigger than Newark.

Newark (map shows its 20 named neighbourhoods; the area covers the whole city) is approximately 63 sq km, while Jackson (map shows its 125 named neighbourhoods; the area covers the whole city) is approximately 289 sq km, making Jackson 363% larger than Newark.
Tip: This to-scale comparison of Newark vs. Jackson uses the Mercator projection, which distorts the size of regions near the poles.
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