Oregon is about 1,405 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while Oregon is approximately 248,631 sq km, making Oregon 140,369% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (3.2 million more people live in Oregon).
Tip: This to-scale comparison of District of Columbia vs. Oregon uses the Mercator projection, which distorts the size of regions near the poles.