St. Casimir Church may refer to several Roman Catholic churches:
Lithuania Church of St. Casimir, Naujoji Vilnia Church of St. Casimir, Vilnius
Poland Church of St. Casimir the Prince, Kraków St. Kazimierz Church, Warsaw St. Casimir the Prince Church, Września
United Kingdom St Casimir's Lithuanian Church, Bethnal Green, London
United States St. Casimir Lithuanian Church, Los Angeles, California St. Casimir Lithuanian Roman Catholic Church, Sioux City, Iowa St. Casimir Church, Baltimore, Maryland Church of St. Casimir (Saint Paul, Minnesota) St. Casimir's Roman Catholic Church (Newark, New Jersey) St. Casimir's Roman Catholic Church, now the Paul Robeson Theater, a New York City Designated Landmark in Brooklyn, New York St. Casimir Church (Cleveland, Ohio)
See also St. Casimir Parish (disambiguation)