Oakland is around the same size as Fremont.

Fremont (map shows its 28 named neighbourhoods; the area covers the whole city) is approximately 202 sq km, while Oakland (map shows its 131 named neighbourhoods; the area covers the whole city) is approximately 202 sq km, making Oakland 99.86% the size of Fremont.
Tip: This to-scale comparison of Fremont vs. Oakland uses the Mercator projection, which distorts the size of regions near the poles.
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