A basement is one or more floors of a building that are either completely or partially below the ground floor.

Basement or The Basement may also refer to:

• Basement (2010 film), a British horror film
• Basement (2014 film), a Filipino horror film
• The Basement (film), a 2017 American horror film
• "The Basement" (Luke Cage), an episode of Luke Cage
• "The Basement", a fictional intelligence agency in the Indian film Dhruva Natchathiram

• Basement (band), a British emo band from Ipswich
• "Basement", a song by Fitz and the Tantrums from All the Feels
• "Basement", a song by Puddle Of Mudd from Come Clean
• "Basement", a 2018 track by Toby Fox from Deltarune Chapter 1 OST from the video game Deltarune
• "The Basement", a song by Pete Rock & CL Smooth from their 1992 album Mecca and the Soul Brother
• Old Church Basement, a 2021 album by Elevation Worship

• Basement (geology), rock that lies below sedimentary rocks
• The Basement, former name of a theatre venue within the Metro Arts Theatre
• The Basement (play), a 1967 television play by Harold Pinter
• The Basement: Meditations on a Human Sacrifice, a 1979 book by Kate Millett

• All pages with titles containing Basement
• All pages with titles beginning with Basement
• Basement 5, a British reggae punk fusion band from London
• In the Basement (film), a 2014 Austrian documentary film