St. Stanislaus Kostka Church is an independent Catholic church located in the city of St. Louis, Missouri. Formerly a parish belonging to the Catholic Church, it was established in 1880 to serve the Polish community in the Archdiocese of St. Louis. The parish is maintained and managed by its parishioners as a 501(c)3 not-for-profit corporation.

St. Louis is an independent city in the U.S. state of Missouri. It is located near the confluence of the Mississippi and the Missouri rivers. In 2020, the city proper had a population of 301,578, while its bi-state metropolitan area, which extends into Illinois, had an estimated population of over 2.8 million. It is the largest metropolitan area in Missouri and the second largest in Illinois. The city's combined statistical area (CSA) is the 20th largest in the United States.