Los Angeles is about 4.2 times bigger than Jackson.

Jackson (map shows its 125 named neighbourhoods; the area covers the whole city) is approximately 289 sq km, while Los Angeles (including the city proper only) is approximately 1,215 sq km, making Los Angeles 320% larger than Jackson.
Tip: This to-scale comparison of Jackson vs. Los Angeles uses the Mercator projection, which distorts the size of regions near the poles.
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