Saint Leo Abbey, Benedictine abbey in St. Leo, Florida, United States.

Saint Leo Abbey is a Benedictine monastery in St. Leo, Florida, made up of several historic buildings spread across a wooded campus. The complex includes a Romanesque-style church, monastic quarters, and structures now used by the neighboring university.

The monastery was founded in 1889 by monks from Saint Vincent Archabbey in Pennsylvania and received the formal status of an abbey in 1902 from Pope Leo XIII. Shortly after its founding, the community also opened a school that eventually grew into the university present today.

The abbey church, the Church of the Holy Cross, was designed by Tampa architect Frank Parziole in the Romanesque style, commissioned by Abbot Francis Sadlier in 1935 and consecrated on January 29, 1948. In 1998 it was listed on the National Register of Historic Places as part of the St. Leo Abbey Historic District. Benedictine nuns from Allegheny, Pennsylvania, founded Holy Name Monastery nearby in February 1889.

The grounds are located in the small town of St. Leo in rural central Florida and are most easily reached by car. Visitors should dress modestly and be aware of prayer times, as the monastery is an active religious community.

The abbey church, the Church of the Holy Cross, was commissioned by Abbot Francis Sadlier in 1935, designed in Romanesque style by Tampa architect Frank Parziole, and consecrated on January 29, 1948. In 1998 it was listed on the National Register of Historic Places as part of the St. Leo Abbey Historic District, a 100-acre area at 33701 CR 52 containing three historic buildings.