Hartford is about 2.8 times smaller than Boston.

Boston is approximately 124 sq km, while Hartford is approximately 45 sq km, making Hartford 36.3% the size of Boston.
Tip: This to-scale comparison of Boston vs. Hartford 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.