Indianapolis is around the same size as San Diego.

San Diego is approximately 844 sq km, while Indianapolis is approximately 935 sq km, making Indianapolis 11% larger than San Diego.
Tip: This to-scale comparison of San Diego 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.