Why and from where did immigration occur in the early 1800s?

In the early 1800s, Immigration to the United States primarily occurred due to economic opportunities, political unrest, and social changes in Europe. Many immigrants came from Ireland, fleeing the Great Famine, and Germany, escaping political upheaval and seeking better livelihoods. These groups settled in urban areas and rural regions, contributing significantly to the labor force and cultural diversity of the nation. The promise of land and jobs in America attracted millions, shaping the demographic landscape of the country.