City size comparison

compared to

Irvine is about 1.4 times bigger than San Francisco.

San Francisco (including the city proper only) is approximately 121 sq km, while Irvine (map shows its 24 named neighbourhoods; the area covers the whole city) is approximately 170 sq km, making Irvine 40% larger than San Francisco.
Tip: This to-scale comparison of San Francisco vs. Irvine uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Irvine vs. San Francisco

Flip Comparison · See true size
See Irvine on top of San Francisco
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Cost of Living Comparison · 7 categories - 2026 data
San Francisco is 26.9% more expensive than Irvine
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