New Hampshire is around the same size as Lake Erie.

Lake Erie is approximately 25,744 km² (9,940 sq mi), while New Hampshire is approximately 23,227 sq km, making New Hampshire 90.22% the size of Lake Erie.
Tip: This to-scale comparison of Lake Erie vs. New Hampshire 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.