Oise is a department in the north of France.

Oise may also refer to:

• Oise (river), a river flowing through Belgium and France
• Canal latéral à l'Oise, a canal parallel to the Oise (river)
• Val-d'Oise, a department of France located in the Île-de-France region
• FS Oise, a ship, frigate of the French Navy of the Fifth Republic
• Oise stone, a type of limestone used for construction
• Bourdon de l'Oise (1758-1798), a French politician

OISE, as a four-letter acronym, may refer to:

• Ontario Institute for Studies in Education, an educational institute in Canada

• Ronde de l'Oise, a cycling race
• Seine–Oise–Marne culture, a prehistoric Chalcolithic culture found in France
• Grand Paris Seine et Oise, France; a conurbation
• Seine-et-Oise, a former department of France
• Sambre–Oise Canal, France
• Oise-Somme Canal, France
• All pages with titles containing -sur-Oise
• All pages with titles beginning with Oise
• All pages with titles containing Oise