Saint Hilary may refer to:
People Hilary of Poitiers (c. 310–c. 367), Bishop of Poitiers and a Doctor of the Church Hilary of Arles (c. 403–449), Bishop of Arles Hilary of Galeata (476–558) Pope Hilary (died 468), also referred to as Pope Hilarius.
Other uses St Hilary, Cornwall, England, a village and civil parish St Hilary's Church, St Hilary (Cornwall), a Grade I listed Anglican church St Hilary, Vale of Glamorgan, Wales, a village Church of St Hilary, St Hilary (Vale of Glamorgan), a Grade II* listed Anglican church Saint Hilary School (disambiguation)
See also Old Saint Hilary's Church, Marin County, California, United States