The Dark Side of the Moon (titled in the 1993 CD release as Dark Side of the Moon) is a concept album by the British progressive rock band Pink Floyd, engineered by Alan Parsons. It was released on March 17, 1973 in the U.S. and March 24, 1973 in the U.K. It is notable for its superior sound engineering, and its use of Musique concrète with philosophical lyrics - something that would eventually become a trademark of Pink Floyd's music. The album was a landmark in rock music, as it featured radio-friendly songs such as "Money", "Time", "Us and Them", and "Brain Damage/Eclipse". Some music critics use the album as a point of reference in determining between "classic" blues-rock and the then-new genre of electronic music.

The Dark Side of the Moon explores the nature of the human experience. For example, "Speak to Me/Breathe" is about birth and being a child with new earthly experiences. "Time" deals with growing older and the overwhelmingly fast approach of death - youth being gone before one even realizes it. "Great Gig in the Sky" deals with thoughts of religion, "Money" deals with consumerism with tongue-in-cheek lyrics and wealth-related sound effects. "Us and Them" deals with conflict, ethnocentrism, and the belief that a person's self is "always in the right". "Brain Damage" and "Eclipse" deal with growing too old to be who one once was, and finally, death. All four members of Pink Floyd, which included guitarist David Gilmour, drummer Nick Mason, bassist and lyricist Roger Waters, and keyboardist Richard Wright, had some form of participation in the writing and production of the album, which is a rarity among later Pink Floyd albums. However, it is the first of five consecutive Pink Floyd albums with lyrics completely credited to Roger Waters. Although The Dark Side of the Moon was the planned title of the album, upon the discovery that the band Medicine Head was to release an album of the same name in 1972, the year prior to The Dark Side of the Moon's release, the band changed the album's title to Eclipse: A Piece for Assorted Lunatics. However, the Medicine Head album flopped, so Pink Floyd reverted to the original title.

The Dark Side of the Moon is widely hailed by many critics and fans as Pink Floyd's magnum opus, and is generally considered their definitive album. In 2006 it was voted "My Favourite Album" by viewers and listeners to the Australian Broadcasting Corporation. In 1990, Australian radio listeners voted it the best album to make love to, and in 2003, Rolling Stone heralded The Dark Side of the Moon as the 43rd greatest album of all time.

The Dark Side of the Moon spent 741 consecutive weeks (14 years) on the USA-based Billboard 200 album chart, the longest duration in history. It is also the sixth highest selling album globally of all time, selling more than forty million units.

The only time there is a gap of silence on the whole album is between "The Great Gig in the Sky" and "Money", where there is a side change on the LP.