Lisbon is about 12 times smaller than Los Angeles.

Los Angeles (including the city proper only) is approximately 1,215 sq km, while Lisbon (map shows its 24 named neighbourhoods; the area covers the whole city) is approximately 100 sq km, making Lisbon 8.24% the size of Los Angeles.
Tip: This to-scale comparison of Los Angeles vs. Lisbon uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.