CIOR may refer to:

• Interallied Confederation of Reserve Officers,
• CIOR (AM), a radio transmitter in Princeton, British Columbia.

• Dunbar Wright Bostwick
• Dunbar–Stearns House
• Dun Beic
• Dunbine
• Dunblane, Doune & Callander Railway
• Dunblane high school
• Dunblane, Ontario
• Dunblane, Perthshire
• Dunblane, Saskatchewan
• Dunblane school shooting
• Dunblane station
• Dunbog
• Dun Borbaidh
• Dunboy (disambiguation)
• Dunboyne A.F.C.
• Dunboyne Castle Novice Hurdle
• Dunboyne, Ontario
• Dunboyne railway station
• Dun & Bradstreet Credibility Corp
• Dun & Bradstreet v. Greenmoss Builders
• Dun Breatainn
• Dun Breatainn station
• Dunbreen Rovers
• Dunbridge
• Dunbrody (1845)