Indianapolis is about 1.6 times smaller than Mexico City.

Mexico City is approximately 1,485 sq km, while Indianapolis is approximately 935 sq km, making Indianapolis 62.96% the size of Mexico City.
Tip: This to-scale comparison of Mexico City vs. Indianapolis 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.