Walter Rudolph Niemann (10 October 1876 – 17 June 1953) was a German composer, arranger, and music critic.
His uncle, Gustav Adolph Niemann (1843–1881) was a violinist and important musical figure in Helsinki.
Niemann first worked as a teacher in Hamburg then served as the editor of the Neue Zeitschrift für Musik in Leipzig from 1904 to 1906.
In 1927, H. Abert in the Illustriertes Musiklexikon styled Niemann "The most important composer for piano today, who understands how to make music both fine and colored, although he often strays into the salon."
Niemann's compositions include 189 opus numbers, of which more than 150 are works for solo piano, chiefly of character pieces.