"Sunday Mornin'" is a song written by Margo Guryan, made famous by Spanky and Our Gang and Oliver, and recorded by many others. Spanky and Our Gang's version became a hit single, reaching #30 on the Billboard Hot 100, #39 on the easy listening chart in early 1968, and #23 in the Canadian RPM Magazine charts. Oliver's 1969 version was also released as a single, which reached #35 and #14 on the same charts (#20 in Canada). "Sunday Mornin'" was listed as one of the "102 most performed songs in the BMI repertoire during 1968".