St. Leo Church or St. Leo's Catholic Church or variations may refer to:
St. Leo's Roman Catholic Church, Mimico, in Toronto, Ontario, Canada Chapel of St Leo, Żurrieq, Malta
United States Saint Leo the Great Parish, San Jose, California St. Leo's Church (Baltimore, Maryland), listed on the National Register of Historic Places (NRHP) St. Leo's Catholic Church (Lewistown, Montana), NRHP-listed St. Leo Church (New York City) Saint Leo Oratory (Columbus, Ohio)
See also St. Leonard's Church (disambiguation)