Immigrant aid organizations played an important role in helping immigrants to establish themselves in the United States.

Hull-House provided numerous services for the poor, many of whom were immigrants, that helped immigrants to learn about American culture and life.

Originally an impoverished Jewish peddler from Switzerland, Guggenheim built a worldwide mining conglomerate after immigrating to the United States.

Father Flanagan was an early and vocal advocate of child-care reform whose experiences as a Roman Catholic parish priest among the impoverished immigrants in Omaha, Nebraska, convinced him that addressing such catastrophic social conditions could only begin with taking in homeless boys and educating them.

Catholic Charities USA is the second-largest provider of social services in the United States, behind only the federal government.