St. Hilarius

St. Hilarius may refer to:

Saints

 * Hilarius or Hilary of Poitiers (c. 310–c. 367), Bishop of Poitiers and Doctor of the Church
 * Pope Hilarius (died 468), Catholic pope and saint
 * Hilarius or Hilary of Arles (c. 403–449), Bishop of Arles and saint

Other uses

 * St. Hilarius Parish Church of Näfels, Näfels, Glarus Canton, Switzerland