India is about 18,572 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while India is approximately 3,287,263 sq km, making India 1,857,111% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (1.4 billion more people live in India).
Tip: This to-scale comparison of District of Columbia vs. India uses the Mercator projection, which distorts the size of regions near the poles.