District of Columbia is about 131 times smaller than New Hampshire.

New Hampshire is approximately 23,227 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.76% the size of New Hampshire. Meanwhile, the population of New Hampshire is ~1.3 million people (714,747 fewer people live in District of Columbia).
Tip: This to-scale comparison of New Hampshire vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.