Which Immigrants to the US during the late 19th century's?

During the late 19th century, the United States saw a significant influx of immigrants primarily from Europe, particularly from countries like Italy, Ireland, Germany, and Poland. Many were fleeing economic hardship, political unrest, or religious persecution in their home countries. This wave of Immigration contributed to the rapid industrialization of the U.S. and the growth of urban centers, as immigrants sought jobs in factories and construction. Additionally, this period marked the beginning of more restrictive immigration policies in response to growing nativism and concerns about assimilation.