Vienna is about 2.1 times bigger than Cincinnati.

Cincinnati is approximately 202 sq km, while Vienna is approximately 415 sq km, making Vienna 106% larger than Cincinnati.
Tip: This to-scale comparison of Cincinnati vs. Vienna 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.