Saint Ouen (Jèrriais: Saint Ouën) is one of the twelve Parishes of Jersey in the Channel Islands. It is in the north west of Jersey. The parish is the largest parish by surface area, covering 8,341 vergées (15 km²).
It is reputed to be the most traditional of the parishes, being the farthest from Saint Helier and with much of the territory of the parish forming a peninsula. Its manor, Saint Ouen's Manor, the seat of the de Carteret family for over eight centuries - is the senior fief in the island, and the influence of that family has also been a factor in the parish's independent-minded approach to its affairs.