What countries did most of the immigrants coming to the United states come from during and following the industrial revolution?

During and following the Industrial Revolution, most immigrants to the United States primarily came from Europe, particularly from countries like Ireland, Germany, Italy, and the United Kingdom. The Irish fled famine and economic hardship, while Germans sought political freedom and better opportunities. Later, as industrialization progressed, many Italians and Eastern Europeans also immigrated, drawn by the promise of jobs and a better life in America. This influx significantly contributed to the labor force needed for industrial growth.