Phoenix is about 5 times bigger than Milwaukee.

Milwaukee is approximately 249 sq km, while Phoenix is approximately 1,342 sq km, making Phoenix 439% larger than Milwaukee.
Tip: This to-scale comparison of Milwaukee vs. Phoenix 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.