Sancta Maria College is a Catholic secondary school located in Louisburgh, County Mayo, Ireland.

[3][4] In 1919, two Sisters of Mercy arrived in Louisburgh, and began the development of what would become the first Catholic co-educational secondary school in Ireland.

[7] The school was extended several times during the 20th century, with significant works undertaken in the 1980s.

[9] In 2017, the school underwent an extension project which cost €7 million.

[3] The project continued for 20 months and included the construction of a new 2-storey extension comprising new main entrance, 12 specialist classrooms, general purpose/dining room and a kitchenette.