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

District of Columbia is approximately 177 sq km, while Texas is approximately 678,052 sq km, making Texas 382,980% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (24.5 million more people live in Texas).
Tip: This to-scale comparison of District of Columbia vs. Texas uses the Mercator projection, which distorts the size of regions near the poles.