Boris Sergeevich Kamensky (15 November 1870 – 21 September 1949) was an Imperial Russian violinist. Born in Nikolaev, Ukraine, son of a Director of a Commercial Bank, Kamensky made his first appearance in concerts at the age of nine. He was noticed as a talented violinist by Eugène Ysaÿe and he started taking lessons with him. He went on to study at the Saint Petersburg State Conservatory (now the Rimsky-Korsakov Saint Petersburg State Conservatory) with Leopold Auer, and he had ensemble classes with Anton Rubinstein; and then he studied with Joseph Joachim in Berlin.