ID

ID or its variants may refer to:
 Identity document, a document used to verify a person's identity

Places
 Idaho, US (postal abbreviation ID)
 Indonesia, ISO 3166-1 alpha-2 country code "ID"
 Indonesian language, ISO 639-1 language code "ID"

Business
 Batik Air (IATA airline code ID), an airline based in Jakarta, Indonesia
 id Software, an American video game developer

Science and technology
 Infectious disease
 Intellectual disability, a generalized neurodevelopmental disorder
 .id, the Internet Top Level Domain code for Indonesia
 id, the generic object datatype in the Objective-C programming language
 Interior design
 Id, one of the Id, ego and super-ego psychic apparatus

Other uses

 Indonesian language (ISO 639-1 code "id")
 Intelligent design, a pseudoscientific argument for the existence of God