Ippolit Karlovich Al'tani (Russian: Ипполит Карлович Альтани; Ukrainian: Альтані Іполит Карлович, Altani Ipolit Karlovich; 27 May [OS 15 May] 1846 – 17 February 1919) was a Russian conductor, choirmaster and violinist.
Al'tani was born in the south of Russian Empire. In 1866 he graduated from Saint Petersburg conservatory as a violinist (studied under Henryk Wieniawski) and composer (studied with Nikolai Zaremba, and Anton Rubinstein). In 1867-82 he worked as a conductor and choirmaster at the Russian opera in Kiev. Al'tani's activity contributed to the development of musical stage skill in Ukraine. In 1882-1906 Al'tani was chief conductor of the Bolshoi Theatre in Moscow.