Orr

• Design review (U.S. government)
• Guild Wars 2
• Justice Orr (disambiguation)
• Office of Rail and Road
• Office of Refugee Resettlement
• Ore (disambiguation)
• Orr (Catch-22)
• Orr (surname)
• Orr Academy High School
• Orr Barouch
• Orr Formation
• Orr Glacier
• Orr Island
• Orr Peak
• Orr School
• Orr's Island
• Orr, Kentucky
• Orr, Minnesota
• Orr, West Virginia
• Orr-Ewing Baronets
• Outer Ring Road (disambiguation)
• Oxygen reduction reaction
• Pulheim
• The Lathe of Heaven
• Urr Water
• objective response rate