Ly

Ly can refer to:

* Ly the Fairy, a character from the video game ""
* Lý Dynasty of Vietnam
* .ly, the Top-level domain for Libya
* .ly, the default filetype extension of the GNU LilyPond sheet music format.
* Hungarian ly, a letter in the Hungarian alphabet
* , the ISO 3166-1 two-letter country code for Libya
* El Al, the largest airline of Israel by IATA airline designator
* Langley (unit)

LY may stand for:
* Labour Youth of Ireland
* Legislative Yuan
* Light year