Bernhard Cossmann (17 May 1822 – 7 May 1910) was a German cellist. Born in Dessau, he first studied under . During his life, he worked for the Grand Opera in Paris and became acquainted with Franz Liszt, with whom he went to Weimar. In 1866, Cossmann was appointed professor of cello studies at the Moscow Conservatory. However, in 1878, Cossmann helped found the Hoch Conservatory in Frankfurt, where he occupied the post of teacher of cello. He died in Frankfurt.