Boston is about 1.6 times smaller than Cincinnati.

Cincinnati is approximately 202 sq km, while Boston is approximately 124 sq km, making Boston 61.45% the size of Cincinnati.
Tip: This to-scale comparison of Cincinnati vs. Boston 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.