Milwaukee is about 9 times bigger than Sydney.

Sydney is approximately 27 sq km, while Milwaukee is approximately 249 sq km, making Milwaukee 833% larger than Sydney.
Tip: This to-scale comparison of Sydney vs. Milwaukee 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.