Phoenix is about 91 times smaller than Mississippi.

Mississippi is approximately 121,489 sq km, while Phoenix is approximately 1,342 sq km, making Phoenix 1.1% the size of Mississippi.
Tip: This to-scale comparison of Mississippi 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.