St. Casimir Church is a parish church of the Roman Catholic Archdiocese of Baltimore located in the Canton neighborhood of Baltimore, Maryland.

It was established to serve the needs of the growing Polish American community in Baltimore.

By that time the Poles were becoming so numerous in Baltimore that less than a year later another Polish Catholic church was established in a neighboring parish, the Holy Rosary Church.

[2] In 2000, the St. Stanislaus Kostka church, another Polish Catholic church in Baltimore, was merged into St. Casimir's and the sacramental registers were transferred to St. Casimir's.

The church is designated as a Polish parish and is administered by the Conventual Franciscans.