Country size comparison

compared to

Monaco is about 422 times smaller than San Diego.

San Diego is approximately 844 sq km, while Monaco is approximately 2 sq km, making Monaco 0.24% the size of San Diego.
Tip: This to-scale comparison of San Diego vs. Monaco uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Monaco vs. San Diego
Flip Comparison · See true size
See Monaco on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 28.5% cheaper than Monaco overall
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