Toronto is about 2 times bigger than Henderson.

Henderson (map shows its 23 named neighbourhoods; the area covers the whole city) is approximately 313 sq km, while Toronto is approximately 630 sq km, making Toronto 101% larger than Henderson.
Tip: This to-scale comparison of Henderson vs. Toronto 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.