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
• 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
• 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

Robots in Disguise are an English electropunk band composed of Dee Plume (vocals and guitar), Sue Denim (vocals and bass) and a changing line-up of backing musicians. The group, formed in 2000, have released four studio albums and are based in Berlin and London.