Oregon is about 1,054 times bigger than Cook Islands.

Cook Islands is approximately 236 sq km, while Oregon is approximately 248,631 sq km, making Oregon 105,252% larger than Cook Islands. Meanwhile, the population of Cook Islands is ~8,128 people (3.8 million more people live in Oregon).
Tip: This to-scale comparison of Cook Islands vs. Oregon uses the Mercator projection, which distorts the size of regions near the poles.