Saint Casimir Church (Polish: Parafia św. Kazimierza w Cleveland) is a Catholic parish church in Cleveland, Ohio, and part of the Roman Catholic Diocese of Cleveland. It is designated "a personal parish for those Catholics of the Latin Rite of Polish descent" in Cleveland. A personal parish is designated under Canon 518 of the 1983 Code of Canon Law. It is located at the north-east corner of intersection of East 82nd St. and Sowiniski Ave., in a part of the St. Clair-Superior neighborhood previously known in Polish as na Poznaniu.