- ACDN stands for Action des Citoyens pour Le Désarmement Nucléaire (French: Citizens Action for Nuclear Disarmament)
- ACDN stands for Auburn Community Development Network (youth leadership program; Auburn, New South Wales, Australia)
- ACDN stands for A Content Delivery Network (computing)
- ACDN stands for Asociacion Colombiana De Neurologia (Spanish: Colombian Association of Neurology; Bogota, Colombia)
- ACDN stands for Automatic Call Distribution Number (Nortel phone systems)
- ACDN stands for Administrative Call-processing Data Node
ACDN