Hermann Graedener or Grädener (8 May 1844 – 15 September 1929) was a German composer, conductor and teacher.
He was educated by his father, composer Karl Graedener.
From 1862 he was organist at the Lutheran City Church in Vienna, and from 1864 violinist in the court's orchestra.
His compositions, influenced by Johannes Brahms, include two symphonies, two violin concertos, two cello concertos, two string quartets, two piano quintets and two piano trios.
(Grove also mentions a piano concerto, but this may be confused with that written by his father.)