Helena is about 13 times smaller than Columbus.

Columbus is approximately 574 sq km, while Helena (map shows its 6 named neighbourhoods; the area covers the whole city) is approximately 44 sq km, making Helena 7.75% the size of Columbus.
Tip: This to-scale comparison of Columbus vs. Helena 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.