District of Columbia is about 3,831 times smaller than Texas.

Texas is approximately 678,052 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.03% the size of Texas. Meanwhile, the population of Texas is ~25.1 million people (24.5 million fewer people live in District of Columbia).
Tip: This to-scale comparison of Texas vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.