"Peg" is a song by American rock group Steely Dan, first released on the band's 1977 album titled Aja. The track was released as single in 1977 and reached number 11 on the US Billboard chart in 1978 and number eight on the Cash Box chart. In Canada, "Peg" spent three weeks at number seven during March 1978. Michael McDonald can be heard providing multi-tracked backup vocals in the choruses, and keyboardist Paul Griffin can also be heard improvising background vocals in the final chorus and fadeout.