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