It was written by Gary Zekley and Mitchell Bottler.

The album version contains a slow organ intro and a longer fadeout, increasing the track's length by almost a minute.

Billboard Hot 100 the week ending September 6, 1969,[4] and number 12 on the Cash Box Top 100.

[5] In Canada, "I'd Wait a Million Years" spent three weeks at number 12.

Arranged By [Horns] – Jimmie Haskell