District of Columbia is about 56,411 times smaller than Canada.

Canada is approximately 9,984,670 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.0% the size of Canada. Meanwhile, the population of Canada is ~38.2 million people (37.6 million fewer people live in District of Columbia).
Tip: This to-scale comparison of Canada vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.