San Bernardino is around the same size as Staten Island.

Staten Island is approximately 149 sq km, while San Bernardino (map shows its 50 named neighbourhoods; the area covers the whole city) is approximately 161 sq km, making San Bernardino 8% larger than Staten Island.
Tip: This to-scale comparison of Staten Island vs. San Bernardino 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.