XY

XY may refer to:

In science:

• coordinates, a system used to locate a point in two dimensions according to the cartesian coordinate system
• XY sex-determination system, a system in biology
• XY model, a model in physics

In spelling:

• Xy (digraph), a digraph of the Romanized Popular Alphabet, used to write Hmong

In culture:

• X&Y, an album by Coldplay
• XY (magazine), a gay male youth magazine that also operated a personals website
• Xy (formerly known as Xytras), a member of the band Samael

In other uses:

• Kyle XY, a television show broadcast by the American Broadcasting Company
• Aktenzeichen XY … ungelöst, television programme broadcast (ZDF)