City size comparison

compared to

San Diego is about 1.9 times smaller than London.

London (including the 32 boroughs of greater London) is approximately 1,572 sq km, while San Diego is approximately 844 sq km, making San Diego 53.69% the size of London.
Tip: This to-scale comparison of London vs. San Diego uses the Mercator projection, which distorts the size of regions near the poles.
Share
Compare further: San Diego vs. London
Flip Comparison · See true size
See San Diego on top of London
→
Cost of Living Comparison · 7 categories - 2026 data
London is 18.2% more expensive than San Diego
→