Houston is about 2.9 times bigger than Columbus.

Columbus is approximately 574 sq km, while Houston is approximately 1,659 sq km, making Houston 189% larger than Columbus.
Tip: This to-scale comparison of Columbus vs. Houston 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.