Twin (disambiguation)

A twin is one of two offspring produced in the same pregnancy.

Twin may also refer to:
 * Twin, Alabama, a city in the United States
 * Twin, Belgium, Walloon name of the Belgium city of Thuin
 * Twin (production team), a Swedish record production and songwriting team
 * Twin (TV series), a Norwegian television crime drama series from 2019
 * Twin (windowing system), a windowing environment for text mode displays
 * Twin pattern, software design pattern
 * Willows TWIN, a Windows emulator
 * Twin, a member of the Minnesota Twins baseball team
 * Flat-twin engine
 * V-twin engine
 * Straight-twin engine, also referred to as a parallel-twin
 * Crystal twin, a crystal sample with two domains containing a twin boundary
 * Twin house, semi-detached housing
 * Twin towns and sister cities, towns and cities involved in town twinning
 * Gemini Twin, an American two-seat powered parachute design
 * Air Creation Twin, a French two seat ultralight trike design

Surname

 * Peter J. Twin (born 1937), English nuclear physicist