RID

RID may refer to:


 * Isaiah ben Mali di Trani (the Elder), an Italian Talmudist
 * Radial immunodiffusion, a scientific technique for measuring the quantity of an antigen
 * Radionuclide identification device, a hand-held instrument for the detection and identification of radioactive sources
 * Reactor Institute Delft, a nuclear research facility in the Netherlands
 * Refractive index detector, a type of chromatography detector
 * Registry of Interpreters for the Deaf, an American Sign Language interpreters' organization
 * Relative identifier, a component of Microsoft Windows NT security
 * RID (insect repellent), an Australian brand
 * Rivista Italiana Difesa, an Italian magazine related to military and geo-strategic issues
 * Robots in Disguise, an English electro band
 * Royal Institute Dictionary, a prescriptive dictionary of Thailand
 * Real-time Inter-network Defense, a reporting method for sharing incident-handling data between networks
 * Rock Island District, commuter rail line between Chicago and Joliet, Illinois