- ACRN stands for America’s Career Resource Network
- ACRN stands for Accounting Classification Reference Number
- ACRN stands for Asthma Clinical Research Network (National Heart, Lung and Blood Institute)
- ACRN stands for AIDS Certified Registered Nurse
- ACRN stands for Les Amis de la Cathédrale Russe de Nice (French: Friends of the Russian Cathedral in Nice; Nice, France)
- ACRN stands for All Campus Radio Network (Ohio University)
- ACRN stands for Acoustic Coordinated Reset Neuromodulation (tinnitus treatment)
ACRN American Country Radio Network (Internet radio)
ACRN Aéro-Club de Rouen Normandie (French aviation club; Normandy, France)
ACRN Académie Chrétienne de la Rive Nord (French: North Shore Christian Academy; Canada)
ACRN