This guide is about "political emigration" of Poles to USA. According to Wikipedia, the history of Polish people in the United States dates to the American Colonial times. Poles have lived in the United States for over 400 years—since 1608. There are 10 million Americans of Polish descent in the USA today, making it the largest "diaspora" of Poles in the world. Polish Americans have always been the largest group of Eastern European descent in the United States.