Johann Bernhard Bach (the younger; to distinguish him from an older family member with the same name) (24 November 1700 – 12 June 1743) was a nephew of Johann Sebastian Bach. He was a German composer and organist.
Johann Bernhard was born and died in Ohrdruf. From 1715 he worked for his uncle as a copyist. In 1721 he followed his father, Johann Christoph Bach, in the post of organist at St. Michael in Ohrdruf.