This is a comprehensive list of U2 songs that have been officially released. The list includes songs that have been performed by the entire band, as well as tracks released under the band's side project with Brian Eno, known as "Passengers". Other side projects, including contributions by solo members of the band, are not included in this list. The list consists of mostly studio recordings; remixes and live recordings are not listed, unless the song has only been released in one of the two formats. Singles are listed as having been released on their respective album, unless the single has no associated album. Only one release is listed per song, unless the song was featured on multiple releases at the same time. All songs (totaling in 240) were written by U2 unless otherwise noted.

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In music, a song is a composition for voice or voices, performed by singing. A song may be accompanied by musical instruments, or it may be unaccompanied, as in the case of a cappella songs. The lyrics (words) of songs are typically of a poetic, rhyming nature, though they may be religious verses or free prose.

A song may be for a solo singer, a duet, trio, or larger ensemble involving more voices. Songs with more than one voice to a part are considered choral works. Songs can be broadly divided into many different forms, depending on the criteria used. One division is between "art songs", "pop songs", and "folk songs". Other common methods of classification are by purpose (sacred vs secular), by style (dance, ballad, Lied, etc.), or by time of origin (Renaissance, Contemporary, etc.).

A song is a piece of music for accompanied or unaccompanied voice or voices or, "the act or art of singing," but the term is generally not used for large vocal forms including opera and oratorio. However, the term is, "often found in various figurative and transferred sense (e.g. for the lyrical second subject of a sonata...)." The noun "song" has the same etymological root as the verb "to sing" and the Oxford English Dictionary (OED) defines the word to mean "that which is sung" or "a musical composition suggestive of song." The OED also defines the word to mean "a poem" or "the musical phrases uttered by some birds, whales, and insects, typically forming a recognizable and repeated sequence and used chiefly for territorial defence or for attracting mates."

Mark Pellington (born March 17, 1962) is an American film director.

Pellington was born in Baltimore, Maryland. He directed The Mothman Prophecies, a 2002 film starring Richard Gere dealing with mysterious deaths foretold by a strange red-eyed flying creature, Mothman, as well as Arlington Road in 1999 starring Tim Robbins and Jeff Bridges. Pellington's father, Bill was a football player with the Baltimore Colts for 12 seasons. He died of complications from Alzheimer's in 1994.

Pellington has also worked with such musical artists as Alice In Chains, Pearl Jam, Foo Fighters, Nine Inch Nails, U2, Demi Lovato, and Bruce Springsteen. He has also made cameo appearances in The Mothman Prophecies, Almost Famous, and Jerry Maguire. He directed the landmark mini-series The United States of Poetry for PBS in 1995. It won the INPUT (International Public Television) Award in 1996. In January 2010, he was named to direct The Orphanage remake, which is produced by Guillermo Del Toro.

Pellington's wife, Jennifer Barrett Pellington, died in 2004 at the age of 42. They had one child.