SRD

SRD may refer to:


 * Sardinian language's ISO 639 code
 * Serenissimus Rudolfus Dux, a title of Archduke Rudolf of Austria
 * Services Reconnaissance Department, an Australian WWII agency
 * Short-range device for radio communication
 * Sports Radio Detroit
 * SR-D, a Dolby technology
 * Stapleton Road railway station's station code
 * Step recovery diode
 * Surinamese dollar by ISO 4217 currency code
 * System Reference Document in role-playing games
 * Systems Research & Development, a Nintendo subsidiary
 * Srđ, a mountain in Dalmatia, Croatia
 * SRD: Super Real Darwin, 1987 video game