Kostyantyn Yevhenovych Bohuslavskyi (* 21 May 1895, Pavlivka - † 7 December 1943) was a Ukrainian composer, singer, and choirmaster. He composed operas (Turbayiv Uprising, children's The Clock), musical comedy Kum and The Night Before Christmas, over 300 songs; music editor of the Kharkiv Radio Studio; repressed in 1937.
He was born in the village of Pavlivka, Starobilsk district, Kharkiv province. From 1922 to 1933, he worked as a choir director at the School of Red Yeomanry in Kharkiv. In the early 1920s, he composed the first Ukrainian Soviet mass songs ("12 Mowers", "Glory to the Will", "Year by Year"), created many popular Red Army songs ("Red Army March", "Youth March", "Chapaev's Song", "On a Battleship", etc.), wrote a large number of songs and choruses for schoolchildren, and arrangements of Ukrainian folk songs. Bohuslavsky is the author of a string quartet on a folk theme called Komaryk, a children's opera and game called Andriyko the Cossack, and several musical comedies. Most of his songs are characterised by fighting spirit and strong-willed rhythms, and their melodies are very close to Ukrainian folk music.