LY or ly may refer to:

Government and politics

* Libya (ISO 3166-1 country code LY) * Lý dynasty, a Vietnamese dynasty * Labour Youth of Ireland * Legislative Yuan, the unicameral legislature of the Republic of China (Taiwan)

Science and technology

* .ly, the Top-level domain for Libya * .ly, the default filetype extension of the GNU LilyPond sheet music format * Light-year, the ''distance'' that light travels in one year in a vacuum * Langley (unit), a unit of energy distribution over a given area

Other uses

* Lý (Vietnamese surname), a Vietnamese surname * Ly the Fairy, a character from ''Rayman 2: The Great Escape'' * ''-ly'', an adjectival and adverbial suffix in English * Hungarian ly, or ''elipszilon'', a digraph in the Hungarian alphabet * El Al (IATA airline designator LY)

Government and politics

Science and technology

Other uses

See also