Lost Song

Lost Song may refer to:


 * Lost Song (TV series), a 2018 Japanese anime series
 * Lost Song (film), a 2008 Canadian film
 * Sword Art Online: Lost Song, a 2015 Japanese video game
 * "The Lost Song", a 2003 song by the Cat Empire from their self-titled debut
 * Lostwave, a genre of songs with little to no information available about their origins, often dubbed "lost"