Dmitry Stepanovych Bortniansky (Russian: Дмитрий Степанович Бортнянский, Ukrainian: Дмитрiй Степанович Бортнянський; alternative transcriptions of names are Dmitri, Bortnianskii, and Bortnyansky; 28 October 1751–10 October [O.S. 28 September] 1825) was a Russian composer and conductor of Ukrainian origin.
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.