Johann Christoph Kellner (15 August 1736 – 1803) was a German organist and composer. He was the son of Johann Peter Kellner.
He was born in Gräfenroda, Thuringia, Germany, where he studied music with his father, moving to Gotha to study with Georg Benda in 1754, returning home in 1755. He went on to live in Amsterdam and The Hague between 1762 and 1763, eventually settling in Kassel, Hesse, Germany, in 1764, where he was appointed court organist and cantor in the Lutheran church in 1772. He died there in 1803.
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.
Published in Frankfurt:
Several more have been lost.