Ly

Ly may refer to:

• Ly the Fairy, a character from Rayman 2: The Great Escape
• Lý Dynasty, a dynasty of Vietnam
• Ly (surname)
• Libya, ISO 3166-1 country code
  • .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
• El Al's airline designator
• Langley (unit)
• Labour Youth of Ireland
• Laughter Yoga
• Legislative Yuan
• Light-year