Johann Ernst Bach (born 25 December 1722 – died 26 March 1777) was a German composer and a member of the prominent Bach musical family, specifically the cousin of Johann Sebastian Bach. He primarily composed in the genres of Baroque and early Classical music. Johann Ernst was known for his instrumental works, particularly for his contributions to chamber music and orchestral compositions. Notable works include the "Sinfonias" and various chamber sonatas, showcasing his skill in counterpoint and melodic development. His compositions often reflected the stylistic transition from the Baroque to the Classical era, incorporating elements of both traditions. Although not as widely recognized as his more famous relatives, Johann Ernst Bach's music contributed to the evolution of the classical style in Germany and influenced contemporaries. His works were performed in the courts of the time, particularly in the region of Weimar, and helped lay the groundwork for the musical innovations that would follow in the late 18th century. His legacy, while overshadowed by the giants of the Bach family, remains significant in the context of Baroque and early Classical music development.