"Helpless" was originally recorded with Young's band Crazy Horse in early 1969, before Young's new CSNY bandmates (he had joined the then-trio in mid-1969) convinced him it would suit them better. The song was simple, at its core effectively the repetition of one melody over a descending D-A-G chord progression. The group found difficulty deciding on an arrangement and many different versions of the song were recorded before the group finally decided on the slow-paced version that appeared on the album. On this final version Young was in the foreground, singing the verses and the chorus with his bandmates providing the "helpless" refrain, while the instrumentation came in the form of acoustic guitar, electric guitar (with volume pedal and tremolo), piano, bass and drums. It became one of the most revered songs from the Déjà Vu album (Q magazine's Peter Doggett regards it as "one of (the album's) showpieces"), and has remained a live favorite of Young's for over thirty years. An alternate mix of the CSNY version was released on Neil Young's "Archives Vol. 1." It features Young playing harmonica and electronically-treated percussion.
The "town in North Ontario" referred to in the opening line of the song is often presumed to be Ontario native Young's hometown; Young himself cleared up the rumors in a 1995 Mojo interview with Nick Kent:
"Well, it's not literally a specific town so much as a feeling. Actually, it's a couple of towns. Omemee, Ontario, is one of them. It's where I first went to school and spent my 'formative' years. Actually I was born in Toronto..."