King of the Delta Blues Singers is a compilation album by American blues musician Robert Johnson, released in 1961 on Columbia Records. It is considered one of the greatest and most influential blues releases ever. In 2003, the album was ranked number 27 on Rolling Stone magazine's list of the 500 greatest albums of all time. The album compiles sixteen mono recordings, nine of which were previously available as 78s on the Vocalion label, originally recorded during two sessions in 1936 and 1937. The records sold well in their target market of the American south and southwest, with "Terraplane Blues" something of a regional hit, but their sales figures were never beyond 5000 or so in total.By the time this album appeared, Johnson was mostly rumor, if known at all, except to a small group of collectors and those who had purchased the original 78s. An advance copy of the album was given by its instigator, John Hammond, to his newest signing to Columbia, Bob Dylan, who had never heard of Johnson and became mesmerized by the intensity of the recordings.