Orr

Orr or ORR may also refer to:

Look up Orr in Wiktionary, the free dictionary.

• Objective response rate, or overall response rate, a parameter in clinical trials for pharmaceutical products
• Office of Rail and Road, a regulatory body in the United Kingdom
• Office of Refugee Resettlement, a program of the US Administration for Children and Families
• Operational Readiness Review (ORR), used by the US government
• Outer Ring Road (disambiguation), a series of roads in various places
• Oxygen reduction reaction, a type of chemical reaction

• Orr, Kentucky, United States, an unincorporated community
• Orr, Minnesota, United States, a small city
• Orr, West Virginia, United States, an unincorporated community
• Orr, a district of Pulheim, Germany
• Orr Glacier, Victoria Land, Antarctica
• Orr Island, Marie Byrd Land, Antarctica
• Orr Peak, Ross Dependency, Antarctica
• Urr Water, Scotland, United Kingdom, archaically known as the River Orr
• Orr Formation, a geologic formation in Utah, United States

• Orr (surname), including a list of people with this name
• Orr Barouch (born 1991), Israeli footballer

• Orr (Catch-22), a fictional character in the novel Catch-22 and the film adaptation
• George Orr, protagonist of the science-fiction novel The Lathe of Heaven by Ursula K. Le Guin and two film adaptations

• Orr Academy High School, a public high school in Chicago, Illinois, United States
• Orr School, Texarkana, Arkansas, United States, on the National Register of Historic Places
• Yorketown Airport, IATA airport code "ORR"

• Ore (disambiguation)
• Orr-Ewing Baronets
• Orr's Island, Maine, United States