District of Columbia is about 1,197 times smaller than Kansas.

Kansas is approximately 211,900 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.08% the size of Kansas. Meanwhile, the population of Kansas is ~2.9 million people (2.3 million fewer people live in District of Columbia).
Tip: This to-scale comparison of Kansas vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.