"All or Nothing" is a song written by Steve Marriott and Ronnie Lane of the British rock band Small Faces and released as a single in 1966.

It was also the first song by the Small Faces to chart in the Republic of Ireland, as "Whatcha Gonna Do About It", "Sha-La-La-La-Lee" and "Hey Girl" all failed to do so.

According to Kay Marriott, Steve's mother, Steve wrote this song about his split with ex-fiancée Sue Oliver, though first wife Jenny Rylance states that Marriott told her he wrote the song for her as a result of her split with Rod Stewart.

The song is used as the theme tune (over the opening credits) on the 2012 BBC UK TV series, The Syndicate, about a group of lottery winners.

The hard rock band UFO covered the song as a bonus track on their album No Heavy Petting.