Ose may refer to:

• Ose (demon)
• Ose (Osei Kofi Tutu I), King of the Ashanti Empire
• Ōse, Ehime, a former village in Japan
• Ose, Nigeria, a Local Government Area of Ondo State
• Ose, Norway, a location in Setesdal
• Ose, Poland
• Ose, Skye, a settlement in Scotland
• -ose, a suffix used in chemistry to indicate a sugar
• Ose (band), a French progressive rock band

OSE may stand for:

• Obras Sanitarias del Estado, a state-owned Uruguayan water utilities company
• Hellenic Railways Organisation, the Greek national railway company
• Œuvre de secours aux enfants, a French Jewish humanitarian organization, founded in Russia in 1912, active in Western Europe during World War II
• Office Server Extensions for Microsoft Servers
• Old St. Edwardian, a person who attended St Edward's School, Oxford
• OMA Service Environment
• Open Source Ecology, A Group Dedicated to the Collaborative Development of Open Source Hardware (And tools/workflows to enable this)
• OPENSTEP Enterprise, NeXT's offering of the OpenStep platform for Microsoft Windows
• Open System Environment, a reference model for Enterprise Architecture
• Operating System Embedded, a real-time operating system created by ENEA
• Order of Saint Elisabeth
• Order of the Star in the East
• Organismós Sidirodrómon Elládos, Hellenic Railways Organisation, the state-owned railway company of Greece
• es:Orquesta Sinfónica de Euskadi, Basque National Orchestra
• Osaka Securities Exchange
• Oslo Stock Exchange

Öse may refer to:

• Öse, a river of North Rhine-Westphalia, Germany, tributary of the Nethe