Dmitry Stepanovych Bortniansky (Ukrainian: Дмитрiй Степанович Бортнянський, Russian: Дмитрий Степанович Бортнянский; alternative transcriptions of names are Dmytro, Dmytri,, Dmitri, Bortnianskii, and Bortnyansky; 28 October 1751–10 October [O.S. 28 September] 1825) was a composer and conductor of Ukrainian origin active in Russia.
Bortniansky is best known today for his liturgical works and his prolific contributions to the genre of choral concertos. He was one of the "Golden Three" of his era, along with Artem Vedel and Maksym Berezovsky. Bortniansky composed in many different musical styles, including choral compositions in French, Italian, Latin, German and Church Slavonic.