"Susan" is a song released in 1967 by The Buckinghams. The song spent 12 weeks on the Billboard Hot 100 chart, peaking at No. 11, while reaching No. 7 on Canada's RPM 100, No. 2 on Canada's CHUM Hit Parade, No. 2 in the Philippines, and No. 18 on New Zealand's NZ Listener chart.

The song contains a short excerpt of Charles Ives' composition, Central Park in the Dark, which contrasts sharply with the sunshine pop flavor of the majority of the song. The section containing this excerpt was added by producer James William Guercio, and the group disliked this addition after they heard it. This section was edited out by many radio stations who played the song.

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