Bronx is about 6 times smaller than Toronto.

Toronto is approximately 630 sq km, while Bronx is approximately 109 sq km, making Bronx 17.33% the size of Toronto.
Tip: This to-scale comparison of Toronto vs. Bronx 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.