American sisterhoods have played key, but underestimated, role in the history of American Polonia.2 They were active communities, and their sisters participated in e very-day life of the immigrant neighborhoods. The Sisters of St. Felix of Cantalice Third Order of St. Francis, commonly known as Felicians, Sisters of the Holy Family of Nazareth, Bernardine Franciscan Sisters, and Sisters of the Resurrection arrived from Polish centers. Other immigrant sisterhoods were established by Polish people in the U.S., with the largest one being the Sisters of St. Joseph of the Third Order of St. Francis, based in Stevens Point, Wisconsin. All of them oriented themselves toward keeping religious and cultural continuity of their compatriots in ethnic urban and rural communities. In the course of time, when the Polish inner city neighborhoods disintegrated, the sisters adapted. Today they cater to mostly Spanish speaking immigrants. In accord with the experiences of immigrants in the United States the Polish Sisterhoods underwent the Americanization process. But there is no scholarly history of this process. This article does not delve into documentary sources, but rather it engages the secondary literature to highlight the historical trends. It is important to point out that the immigrant communities of sisters became more visible, and even more powerful, than they had ever been in Polish lands. This is not to say that sisters were invisible in the Old World. The sisterhoods were an important