ACR

ACR is a three-letter acronym that may refer to:

* Absolute Category Rating, a subjective video quality test method
* Access Control Router
* Dodge Viper ACR (American Club Racing)
*Accrington railway station, United Kingdom, from its National Rail code
*A Certain Ratio, post-punk band
*A. C. Reynolds High School, Asheville, North Carolina, United States
*Acronym
*Action Committee for Renewal, a Togolese opposition party
*Advanced CANDU Reactor, a nuclear reactor
*Advanced Combat Rifle, a United States Army program
*Advanced Communications Riser
*Albumin/creatinine ratio
*Alfred County Railway in South Africa, which ran the famous train the Banana Express
*Algoma Central Railway, a railway in Northern Ontario
*Allowed cell rate, in ATM networks
*Ambitious card routine
*American civil religion
*American College of Radiology
*American College of Rheumatology
*Anomalous cosmic ray
*Arctic Circle Race, a cross country ski race in Sisimiut, Greenland
*Arctic Circle Raceway, a race track in Norway
*Armored cavalry regiment, an army or national guard regiment in the United States
*Association for Consumer Research
*Attenuation to crosstalk ratio
*Australian Capital Reserve
*Automobil Clubul Român (Romanian Automobile Club), a member of the FIA
*Anonymous Call Rejection
*Bushmaster ACR, a rifle