Lost and Found is the debut extended play (EP) by South Korean singer-songwriter IU.

It was released by LOEN Entertainment on September 23, 2008.

IU collaborated with lyricist and producer Choi Gap-won, who had previously produced songs including "Amnesia" by Gummy, "Incurable Disease" by Wheesung, and "Toc Toc Toc" by Lee Hyori.

Lee Jong-hoon of Soul-Shop and the singer Mario additionally worked on the title song, "Lost Child".

[1] The music video for "Lost Child" (Korean: 미아; RR: Mia), featuring Thunder, was uploaded through LOEN Entertainment's official YouTube channel on July 19, 2011, after the singer rose to stardom with the success of "Good Day".