Johann Christoph Kellner was a German organist and composer. He was the son of Johann Peter Kellner. He wrote a treatise on music theory entitled Grundriss des Generalbasses (Principles of basso continuo), Op. 16, pt. 1 (Kassel, 1783, 1796), which was very successful. Most of his compositions are keyboard works in a similar galant style to his father's, with homophonic textures and clear song-like melodies. His concertos for harpsichord or piano anticipate the Viennese classical concerto, and share common features with his contemporary C. P. E. Bach. Many of his works were popular in their own time, as demonstrated by their inclusion in several 18th-century collections.