ID

ID or its variants may refer to:
 * Identity document, a document used to verify a person's identity
 * Identifier, a symbol which uniquely identifies an object or record

People

 * I. D. Ffraid (1814–1875), Welsh poet and Calvinistic Methodist minister
 * I. D. McMaster (1923–2004), American assistant district attorney
 * I. D. Serebryakov (1917–1998), Russian lexicographer and translator

Places

 * İd or Narman, a town in Turkey
 * Idaho, US (postal abbreviation ID)
 * Indonesia, ISO 3166-1 alpha-2 country code "ID"
 * Indonesian language, ISO 639-1 language code "ID"

Music

 * The Id (band), an English new wave/synthpop band
 * New:ID, an upcoming Filipino boy band

Albums

 * I.D. (album), a 1989 album by The Wailers Band
 * ID (Michael Patrick Kelly album), a 2017 studio album by Michael Patrick Kelly
 * Id (Siddharta album), 1999
 * [id] (Veil of Maya album), 2010
 * ID, an album by Anna Maria Jopek
 * The Id (album), a 2001 studio album by Macy Gray

Songs

 * ID (song), a 2015 single by Kygo
 * I.D., a 2004 song by Kasabian from their self-titled album

Periodicals

 * I.D. (magazine), an American magazine focusing on Architecture, Graphic and Industrial Design
 * i-D, a British fashion magazine
 * Ideas and Discoveries (i.D.), a magazine covering science, with heavy interest in social science

Television

 * "I.D." (Law & Order), an episode of Law & Order
 * Investigation Discovery, an American cable television channel

Film

 * I.D. (1995 film), a British film about football hooliganism
 * I.D. (2012 film), an Indian Hindi drama
 * The Id (film), a 2016 American thriller/horror film

Other uses in arts, entertainment, and media

 * I.D. (play), 2003 British play by Anthony Sher
 * Id (comics), a manhwa by Kim Daewoo, art by A. T. Kenny'
 * Id, a fictional kingdom in The Wizard of Id, an American comic strip
 * iD (video game), a 1986 computer game
 * Investigation Discovery, stylized as "ID", an American pay television network

Brands and enterprises

 * ID (public relations), a public relations firm
 * ID Labs, an American music production and engineering team
 * iD Mobile, a telephone network owned by Carphone Warehouse
 * Interlink Airlines (IATA airline code ID), an airline based in Johannesburg, South Africa
 * Batik Air (IATA airline code ID), an airline based in Jakarta, Indonesia
 * Citroën ID, a variant of the Citroën DS car
 * Volkswagen ID. series, a series of concept cars that have been promoted into production
 * id Software, an American video game developer

Finance

 * International dollar, common name for the Geary–Khamis dollar, a hypothetical unit of currency
 * Invoice discounting, a form of Factoring (finance) in the UK

Politics

 * Inclusive Democracy, a project that aims for direct, economic, social, and ecological democracy
 * Independent Democrats, a political party in South Africa
 * Identity and Democracy, a political group in the European Parliament

Biology and medicine

 * Ide (fish), also spelled Id
 * Infectious disease
 * Infectious dose
 * Insomnia disorder
 * Intellectual disability, a generalized neurodevelopmental disorder

Computing

 * Id (programming language), a parallel functional programming language
 * iD (software), an editor for OpenStreetMap geodata
 * id (Unix), a command to retrieve group and user identification
 * .id, the Internet Top Level Domain code for Indonesia
 * id, the generic object datatype in the Objective-C programming language
 * Instruction decoder, a decoder in CPUs
 * Internet Draft, a working document of the IETF

Design and engineering

 * Industrial design, a process of designing products for mass production
 * Information design, the practice of presenting information in a way that fosters understanding
 * Inside diameter, also 'inner diameter' or 'I.D.'; a dimension commonly used to specify the size of tubing or pipe
 * Interaction design, the practice of designing interactive digital products, environments, systems, and services
 * Interior design, the art and science of enhancing the interior of a building
 * Instructional design, the study of creating better instructional experiences

Mathematics

 * Identity function, a function that always returns the same value that was used as its argument
 * Influence diagram, a graphical and mathematical representation of a decision situation
 * Icosidodecahedron, a uniform polyhedron

Psychology

 * Id, one of the Id, ego and super-ego psychic apparatus defined in Sigmund Freud's structural model of the psyche

Other uses

 * (law) Id., Latin, short for idem (translation: "the same"), used in legal citations to refer to the previous citation
 * (linguistics) Indonesian language (ISO 639-1 code "id"), a standardized register of Malay
 * (linguistics) Id (cuneiform), a common-use sign in cuneiform texts
 * (philosophy) Intelligent design, a pseudoscientific argument for the existence of God
 * (sports) ID (classification), a Paralympic rowing classification
 * A US Navy hull registration number prefix: Identification number (ID)