Viacheslav Kostiantynovych Prokopovych (1881 – 1942) was a Ukrainian politician and historian. Starting in 1905, he was a politician of the Ukrainian Democratic-Radical Party (UDRP), established in Kiev. At the end of World War I, he was a member of the Ukrainian Party of Socialists-Federalists (UPSF) and Central Rada. In 1918, he served as the minister of education in a cabinet of Ukrainian People's Republic (UNR), headed by Vsevolod Holubovych. On 26 May 1920, Viacheslav Prokopovych became the prime minister of the UNR until 14 October 1920. At the beginning of 1921 the government went into exile. The cabinet was headed twice by Prokopovych (March – August 1921, and May 1926 – October 1939). In 1925–1939, he was also a founder and chief editor of Tryzub, published in Paris.