NASD

NASD may refer to:


 * National Ag Safety Database, maintained by the Centers for Disease Control and Prevention
 * National Amalgamated Stevedores and Dockers, a British trade union
 * National Association of Securities Dealers, the former name of the American self-regulatory organization for broker-dealers, now known as the Financial Industry Regulatory Authority (FINRA)
 * Network-Attached Secure Disks, a 1997–2001 research project of Carnegie Mellon University, with the goal of providing cost-effective scalable storage bandwidth
 * Norristown Area School District, located in Montgomery County, Pennsylvania
 * North Allegheny School District, located in Wexford, Pennsylvania