"Josie" is a song written by Walter Becker and Donald Fagen and first released by Steely Dan on their 1977 album Aja. It was also released as the third single from the album and performed modestly well, reaching #26 on the Billboard Hot 100. It has appeared on several Steely Dan live and compilation albums.

Becker and Fagen wrote an early version of "Josie" well before the recordings for Aja took place. While most of the songs on the album fuse jazz with rock, Allmusic critic Stewart Mason describes "Josie" has as the album's "most conventional rocker." Nonetheless "Josie" incorporates many jazz chords. Don Breithaupt sees an influence from the Delta blues, particularly in the "stark open fifths and lyric-driven rhythm," but Breithaupt also notes that it incorporates "exotic open chords derived from the parallel Phrygian scale."Rolling Stone Magazine critic Michael Duffy describes it has having "tight, modal tunes with good hooks in the choruses, solid beats with intricate counter rhythms and brilliantly concise guitar solos" as well as a complex horn chart and "schmaltzy" L.A. jazz riffs. Mason praises the song's "sly irony and danceable R&B groove." J.J. Syrja notes that the song even echoes disco, but doesn't "fall victim" to it.

Becker plays a guitar solo on the song, one of the few on Aja. Steely Dan biographer Brian Sweet particularly praised his solo, calling it "a real stormer." Fagen sings the lead vocals. The other musicians on the song include Chuck Rainey on bass guitar, Victor Feldman on electric piano and Larry Carlton and Dean Parks on guitar. The drummer is Jim Keltner, who critic Victor Aaron particularly praises for a fill that restarts the song near the end after a brief pause.

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