St. Landry Catholic Church is a historic Roman Catholic church in Opelousas, Louisiana. It is dedicated to Saint Landry of Paris (Bishop c. AD 650). The current church building, in Romanesque Revival style, was completed in 1909.The church and cemetery were placed on the National Register of Historic Places in the United States, on May 5, 1982. By 1792, the church had been renamed from the original title, "Parish Church of the Immaculate Conception of the Post of Opelousas".