American bluegrass musician (b. April 21, 1924, Manchester, Kentucky; d. December 31, 2010, Cincinnati, Ohio).

John Dill Jarvis, known by his initials, was a native of rugged Clay County, Kentucky who spent his adult life as an Appalachian migrant in the Greater Cincinnati area. Although primarily working as a paint contractor, he played a great deal of music as a sideline and recorded numerous albums of bluegrass gospel music. As a composer of many sacred songs, two have entered the realm of classics in the field.