Organizations
- A Cappella Records, a record label specializing in contemporary a cappella music
- Action Committee for Renewal, a Togolese opposition party
- Alexandria Community Rowing, Adult rowing program in Alexandria, Virginia, United States
- American Club Racing (Dodge Viper ACR)
- American College of Radiology
- American College of Rheumatology
- Americans for Campaign Reform
- ACR score for rheumatoid arthritis
- Association for Consumer Research
- Atlantic Canada Rocks, a music news website covering Canada's east coast.
- Australian Capital Reserve
- Australian Catholic Relief, the former name of Caritas Australia
- Automobil Clubul Român (Romanian Automobile Club), a member of the FIA
Read more about this topic: ACR