Saint Leo the Great Church is a territorial parish of the Roman Catholic Diocese of San Jose in California.
The original St. Leo the Great Church was built in 1915 and was named for Pope Leo I. The first mass at St. Leo's Chapel was celebrated by the Rev. Father Culligan on August 8, 1915.
On Christmas Eve 1953, Father Manning celebrated the first mass in the new (and current) church building, which he was instrumental in helping to build.
St. Leo the Great Church is affiliated with Saint Leo the Great School, a private Catholic School that provides Pre-school through 8th grade education. In 2015, both St. Leo the Great Church and School celebrated their centennial year.
The church is located in the St. Leo section of the Shasta-Hanchett neighborhood of San Jose, California.