SACD may stand for:

• Super Audio CD, a form of digital audio storage
• Société des Auteurs et Compositeurs Dramatiques, a French society representing authors and their work

• Storage Array Control Device, a Hewlett Packard term
• SAC-D Argentine satellite
• Subacute combined degeneration of spinal cord caused by vitamin B12 deficiency

Super Audio CD (SACD) is a read-only optical disc for audio storage, introduced in 1999. It was developed jointly by Sony and Philips Electronics, and intended to be the successor to their Compact Disc (CD) format. While the SACD format can offer more channels (e.g. surround sound), and a longer playing time than CD, research published in 2007 found no significant difference in audio quality between SACD and standard CD at ordinary volume levels.