Lost or LOST may refer to getting lost, or to:

• Lost (TV series), a 2004 American drama series about people who become stranded on a mysterious island
• Lost (2001 TV series), a short-lived American and UK reality television series
• Lost (South Korean TV series), a 2021 South Korean television series
• "Lost" (Stargate Universe), an episode of science fiction television series Stargate Universe
• "Lost", an episode of Unleashed!
• "Lost", an episode of the Canadian documentary TV series Mayday
• "Lost", an episode of Disney's So Weird
• "The Lost" (Class), an episode of the first series of the Doctor Who spin-off series Class

• Lost (1950 film), a Mexican film directed by Fernando A. Rivero
• Lost (1956 film), a British thriller starring David Farrar
• Lost (1983 film), an American film directed by Al Adamson
• Lost! (film), a 1986 Canadian film directed by Peter Rowe
• Lost (2004 film), an American thriller starring Dean Cain
• The Lost (2006 film), an American psychological horror starring Marc Senter
• Lost (2023 film), an Indian Hindi-language thriller film

• Lost (Maguire novel), a 2001 horror/mystery novel by Gregory Maguire
• Lost (Robotham novel), a 2005 Michael Robotham novel
• Lost, a novel by Alice Lichtenstein
• Lost: A Memoir, a 2009 memoir by Canadian author Cathy Ostlere
• The Lost: A Search for Six of Six Million, a 2006 memoir by Daniel Mendelsohn
• The Lost (Durst novel), a 2014 fantasy novel by American author Sarah Beth Durst

• Lost (band), an Italian pop rock band
• The Lost (band), a Boston garage rock band

• Lost (8Ball album), 1998
• Lost (Carpark North album), 2010
• Lost (Cool Calm Pete album), 2005
• Lost (Died Pretty album), 1988
• Lost (Elegy album), 1995
• Lost (RTZ album), 1998

• "Lost" (The Badloves song), 1993
• "LosT" (Bring Me The Horizon song). 2023
• "Lost" (Cold Chisel song), 2015
• "Lost" (Faith Hill song), 2007
• "Lost" (Frank Ocean song), 2012
• "Lost" (Gorilla Zoe song), 2008
• "Lost" (Hunter Brothers song), 2018
• "Lost" (Lasgo song), 2009
• "Lost" (Linkin Park song), 2023
• "Lost" (Menudo song), 2008
• "Lost" (Maroon 5 song), 2021
• "Lost" (Michael Bublé song), 2007
• "Lost" (NF song), 2021
• "Lost" (Roger Sanchez song), 2006
• "Lost" (Skin song), 2003
• "Lost" (Vassy and Afrojack song), 2017
• "Lost!", by Coldplay
• "Lost", by Amanda Palmer & the Grand Theft Orchestra from Theatre Is Evil
• "Lost", by Annie Lennox from Songs of Mass Destruction
• "Lost", by Anouk from Hotel New York
• "Lost", by Avenged Sevenfold from Avenged Sevenfold
• "Lost", by the Box Tops from Cry Like a Baby
• "Lost", by BTS from Wings
• "Lost", by Chance the Rapper featuring No name from Acid Rap
• "Lost", by The Church from Starfish
• "Lost", by Clockwork Radio from State of Mind EP
• "Lost", by the Cure from The Cure
• "Lost", by Dead by April from Incomparable
• "Lost", by Delain from April Rain
• "Lost", by Dusty Springfield from A Brand New Me
• "Lost", by Edge of Sanity from The Spectral Sorrows
• "Lost", by Haste the Day from Coward
• "Lost", by Katy Perry from One of the Boys
• "Lost", by Killswitch Engage from Killswitch Engage (2009 album)
• "Lost", by Korn from Life Is Peachy
• "Lost", by Kreator from Cause for Conflict
• "Lost", by Kris Allen from Horizons
• "Lost", by the Meat Puppets from Meat Puppets II
• "Lost", by Nevermore from The Politics of Ecstasy
• "Lost", by Neurosis from Enemy of the Sun
• "Lost", by Nik Kershaw from You've Got to Laugh
• "Lost", by Orbital from Blue Album
• "Lost", a 2019 song by Onlychild
• "Lost", by Red from End of Silence
• "Lost", by Robbie Williams from XXV
• "Lost", by Stabbing Westward from Ungod
• "Lost", by Tristania from World of Glass
• "Lost", by Uriah Heep from Into the Wild
• "Lost", by Van der Graaf Generator from H to He, Who Am the Only One
• "Lost", by Will Haven from Voir Dire
• "Lost", by Within Temptation from The Unforgiving
• "Lost", by The Eden Project from Entrance

• Lost: Via Domus, a 2008 video game by Ubisoft based on the Lost TV series
• The Lost (video game), a 2002 vaporware game by Irrational Games

• Lost, Aberdeenshire, a hamlet in Scotland
• Lake Okeechobee Scenic Trail, or LOST, a hiking and cycling trail in Florida, US

• Local option sales tax
• Mustard gas, originally known as Lost
• Lost Generation, the social generational cohort that was in early adulthood during World War I
• Abbreviation of lost work, any work which is known to have been created but has not survived to the present day

• Loss (disambiguation)
• Lost Cause (disambiguation)
• Lost River (disambiguation)
• Lost Soul (disambiguation)
• Lost Souls (disambiguation)
• All pages with titles beginning with Lost
• All pages with titles containing Lost